A332982 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A332982

Decimal expansion of Pi/exp(gamma).

1, 7, 6, 3, 8, 7, 6, 9, 8, 8, 8, 6, 2, 0, 4, 5, 6, 9, 0, 6, 9, 2, 6, 6, 2, 1, 3, 4, 5, 4, 3, 3, 3, 9, 5, 3, 5, 0, 8, 6, 0, 2, 7, 2, 2, 8, 9, 6, 6, 7, 5, 0, 7, 0, 2, 3, 1, 3, 4, 3, 5, 3, 2, 1, 1, 2, 1, 0, 5, 7, 9, 1, 2, 5, 9, 0, 0, 7, 7, 7, 1, 7, 3, 2, 3, 9, 2, 0, 1, 8, 6, 3, 6, 7, 1, 8, 9, 4, 3, 8

(list; constant; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Arises in the weak-coupling BCS model of superconductors, from the integral Integral_{0..a} tanh(x)/x dx that approaches log(4*exp(gamma)*a/Pi) as a becomes large.

LINKS

Table of n, a(n) for n=1..100.

J. Bardeen, L. N. Cooper, and J. R. Schrieffer, Theory of Superconductivity, Physical Review, 108 (1957), 1175-1204.

EXAMPLE

1.7638769888620456906926621345433395350860272289667507023134353211210579125900...

MATHEMATICA

RealDigits[Pi/E^(EulerGamma), 10, 100][[1]]

PROG

(PARI) Pi/exp(Euler) \\ Michel Marcus, Mar 28 2020

CROSSREFS

Cf. A000796 (Pi), A001113 (e), A001620 (Euler-Mascheroni constant), A073004 (exp(gamma)), A080130 (exp(-gamma)).

Sequence in context: A021571 A013675 A198878 * A335996 A187799 A288935

Adjacent sequences: A332979 A332980 A332981 * A332983 A332984 A332985

KEYWORD

nonn,cons

AUTHOR

Spenser Talkington, Mar 05 2020

STATUS

approved