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Revision History for A086648

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

Decimal expansion of the sum n^(-2n) for n=1 through infinity.
(history; published version)

#14 by OEIS Server at Tue Feb 21 07:56:06 EST 2023

LINKS

Alois P. Heinz, <a href="/A086648/b086648_1.txt">Table of n, a(n) for n = 1..10000</a>

#13 by Alois P. Heinz at Tue Feb 21 07:56:06 EST 2023

STATUS

editing

approved

Discussion

Tue Feb 21

07:56

OEIS Server: Installed new b-file as b086648.txt.  Old b-file is now b086648_1.txt.

#12 by Alois P. Heinz at Tue Feb 21 07:55:59 EST 2023

LINKS

Winston de Greef, Alois P. Heinz, <a href="/A086648/b086648_1.txt">Table of n, a(n) for n = 1..10000</a>

#11 by Alois P. Heinz at Mon Feb 20 15:53:35 EST 2023

STATUS

proposed

editing

Discussion

Mon Feb 20

16:00

Winston de Greef: I will double check the calculations latter.

19:15

Winston de Greef: I calculated this by adding the first k inverses of n^(2n) with k originally equal to 100. I double checked it with a larger k of 150, and found that after a few hundred terms in this series, the digits were different. This b-file should be deleted as it is incorrect.

20:26

Andrew Howroyd: We have no ability to delete b-files easily (it requires a sysadmin to physically remove the file). Can you provide a smaller b-file that you are sure contains accurate values?

20:31

Andrew Howroyd: The PARI prog seems robust at calculating digits. (increasing precision doesn't seem to give different values)

20:35

Andrew Howroyd: If you go to https://pari.math.u-bordeaux.fr/gp.html then on enter \p1500 to set precision followed by digits(floor(10^1000 * suminf(k=1, 1./k^(2*k)))) you will get some output that you can compare with yours.

20:42

Winston de Greef: Ok, I'll look into it tomorrow

#10 by Winston de Greef at Mon Feb 20 15:33:02 EST 2023

STATUS

editing

proposed

Discussion

Mon Feb 20

15:53

Alois P. Heinz: I cannot confirm the digits in the b-file ...

#9 by Winston de Greef at Mon Feb 20 14:10:10 EST 2023

LINKS

Winston de Greef, <a href="/A086648/b086648.txt">Table of n, a(n) for n = 1..10000</a>

STATUS

approved

editing

#8 by Charles R Greathouse IV at Thu May 28 09:44:43 EDT 2015

STATUS

editing

approved

#7 by Charles R Greathouse IV at Thu May 28 09:44:40 EDT 2015

PROG

(PARI) suminf(k=1, 1./k^(2*k)) [From _\\ _Franklin T. Adams-Watters_, Mar 23 2010]

CROSSREFS

Cf. A062206, A073009.

Cf. A073009. [From Franklin T. Adams-Watters, Mar 23 2010]

STATUS

approved

editing

#6 by Russ Cox at Fri Mar 30 17:38:51 EDT 2012

EXTENSIONS

Clarified definition - _R. J. Mathar (mathar(AT)strw.leidenuniv.nl), _, Feb 06 2009

Discussion

Fri Mar 30

17:38

OEIS Server: https://oeis.org/edit/global/190

#5 by Russ Cox at Fri Mar 30 17:35:15 EDT 2012

PROG

(PARI) suminf(k=1, 1./k^(2*k)) [From _Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), _, Mar 23 2010]

CROSSREFS

Cf. A073009. [From _Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), _, Mar 23 2010]

EXTENSIONS

More terms from _Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), _, Mar 23 2010

Discussion

Fri Mar 30

17:35

OEIS Server: https://oeis.org/edit/global/165