This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A250129 #13 Feb 16 2025 08:33:24 %S A250129 8,3,8,8,4,9,2,6,6,3,2,9,5,8,5,4,8,6,7,8,0,2,7,4,2,9,2,3,0,8,6,3,4,3, %T A250129 0,0,0,0,5,1,4,4,6,0,4,2,4,4,9,4,7,7,1,4,3,1,1,6,0,8,6,9,2,4,6,8,2,9, %U A250129 0,7,8,2,3,4,4,3,3,1,3,3,4,8,8,9,7,4,1,9,3,9,7,8,0,2,1,1,5,9,0,8,4,9,4,5,8 %N A250129 Decimal expansion of the negated value of the digamma function at 1/8. %H A250129 Eric Weisstein's MathWorld, <a href="https://mathworld.wolfram.com/GausssDigammaTheorem.html">Gauss's Digamma Theorem</a>. %H A250129 Wikipedia, <a href="http://en.wikipedia.org/wiki/Digamma_function#Special_values">Digamma function: special values</a>. %H A250129 <a href="/index/Di#differential_equations">Index entries for sequences related to the digamma function</a> %F A250129 Psi(1/8) = -gamma - (1/2)*(1+sqrt(2))*Pi - sqrt(2)*arccoth(sqrt(2)) - 4*log(2). %e A250129 Psi(1/8) = -8.388492663295854867802742923086343000051446... %t A250129 RealDigits[PolyGamma[1/8], 10, 105] // First %o A250129 (PARI) -psi(1/8) \\ _Charles R Greathouse IV_, Jan 15 2015 %Y A250129 Cf. A020759, A020777, A047787, A200064, A222457, A222458. %K A250129 nonn,cons,easy %O A250129 1,1 %A A250129 _Jean-François Alcover_, Jan 15 2015