The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A249153

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

Exponent of 2 in the hyperfactorial of 2n: a(n) = A007814(A002109(2n)).
(history; published version)

#20 by Michael De Vlieger at Tue Sep 10 08:44:18 EDT 2024

STATUS

reviewed

approved

#19 by Joerg Arndt at Tue Sep 10 02:26:00 EDT 2024

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proposed

reviewed

#18 by Amiram Eldar at Tue Sep 10 01:20:04 EDT 2024

STATUS

editing

proposed

#17 by Amiram Eldar at Tue Sep 10 01:07:37 EDT 2024

MATHEMATICA

Table[IntegerExponent[Hyperfactorial[2*n], 2], {n, 0, 55}] (* Amiram Eldar, Sep 10 2024 *)

#16 by Amiram Eldar at Tue Sep 10 01:04:32 EDT 2024

FORMULA

a(n) ~ 2*n^2. - Amiram Eldar, Sep 10 2024

STATUS

approved

editing

#15 by Alois P. Heinz at Thu Oct 14 18:51:50 EDT 2021

STATUS

proposed

approved

#14 by Kevin Ryde at Thu Oct 14 18:41:03 EDT 2021

STATUS

editing

proposed

#13 by Kevin Ryde at Thu Oct 14 18:38:21 EDT 2021

CROSSREFS

Cf. A002109, A007814, A143157, A069895 (first differences).

STATUS

approved

editing

#12 by N. J. A. Sloane at Sat Aug 22 00:49:58 EDT 2015

STATUS

proposed

approved

#11 by Chai Wah Wu at Fri Aug 21 20:56:04 EDT 2015

STATUS

editing

proposed