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 A245273 #6 Feb 16 2025 08:33:23
%S A245273 0,0,6,3,5,6,4,5,5,9,0,8,5,8,4,8,5,1,2,1,0,1,0,0,0,2,6,7,2,9,9,6,0,4,
%T A245273 3,8,1,9,8,9,9,4,9,1,0,1,6,0,9,1,9,8,8,1,1,6,9,8,6,8,2,8,0,8,5,7,7,6,
%U A245273 0,0,7,8,3,9,8,0,8,5,3,4,2,7,6,4,8,7,0,5,6,0,3,2,8,0,8,3,9,2,4,7,2,6,6,3,7,4,2
%N A245273 Decimal expansion of zeta''(0)+2, the coefficient of z^2 in the Laurent expansion of zeta(z) at the origin.
%D A245273 Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, Section 2.21 Stieltjes Constants, p. 168.
%H A245273 Eric Weisstein's MathWorld, <a href="https://mathworld.wolfram.com/StieltjesConstants.html">Stieltjes Constants</a>
%H A245273 Wikipedia, <a href="http://en.wikipedia.org/wiki/Stieltjes_constants">Stieltjes constants</a>
%F A245273 -Pi^2/24 - log(2*Pi)^2/2 + gamma^2/2 + gamma(1) + 2, where gamma is Euler's constant and gamma(1) is the first Stieltjes constant.
%e A245273 -0.00635645590858485121010002672996043819899491016091988116986828085776...
%t A245273 Join[{0, 0}, RealDigits[Zeta''[0]+2, 10, 105] // First]
%Y A245273 Cf. A082633(gamma(1)), A110544(coefficient of z).
%K A245273 nonn,cons,easy
%O A245273 0,3
%A A245273 _Jean-François Alcover_, Jul 16 2014