A102754 Decimal expansion of (Pi^2)/2 - 4.

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

Offset

0,1

Comments

Equals psi_1(3/2), where psi_1(x) is the second logarithmic derivative of Gamma(x).

Links

Table of n, a(n) for n=0..104.

Eric Weisstein's World of Mathematics, Trigamma Function.

Index entries for transcendental numbers

Formula

Equals the value of A102753 minus 4. - R. J. Mathar, Aug 30 2008

Example

0.934802200544679309417245499938075567656849703620395313206...

Mathematica

RealDigits[Pi^2/2-4, 10, 120][[1]] (* Harvey P. Dale, Dec 18 2021 *)

Prog

(PARI) Pi^2/2 - 4 \\ Michel Marcus, Sep 04 2015

Crossrefs

Sequence in context: A222233 A021111 A242302 * A225455 A154184 A169791

Adjacent sequences: A102751 A102752 A102753 * A102755 A102756 A102757

Keyword

cons,nonn

Author

Jun Mizuki (suzuki32(AT)sanken.osaka-u.ac.jp), Feb 10 2005

Status

approved