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 A102754 #17 Feb 16 2025 08:32:56 %S A102754 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, %T A102754 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, %U A102754 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 %N A102754 Decimal expansion of (Pi^2)/2 - 4. %C A102754 Equals psi_1(3/2), where psi_1(x) is the second logarithmic derivative of Gamma(x). %H A102754 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TrigammaFunction.html">Trigamma Function</a>. %H A102754 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A102754 Equals the value of A102753 minus 4. - _R. J. Mathar_, Aug 30 2008 %e A102754 0.934802200544679309417245499938075567656849703620395313206... %t A102754 RealDigits[Pi^2/2-4,10,120][[1]] (* _Harvey P. Dale_, Dec 18 2021 *) %o A102754 (PARI) Pi^2/2 - 4 \\ _Michel Marcus_, Sep 04 2015 %K A102754 cons,nonn %O A102754 0,1 %A A102754 Jun Mizuki (suzuki32(AT)sanken.osaka-u.ac.jp), Feb 10 2005