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 A377731 #6 Nov 06 2024 04:39:36 %S A377731 2,4,7,2,0,9,9,5,6,9,7,3,5,1,6,2,5,5,7,9,1,1,8,0,0,4,6,2,9,2,7,0,1,3, %T A377731 3,9,4,9,5,6,7,9,8,4,3,1,3,6,2,3,5,5,8,7,4,1,1,4,5,7,0,7,2,6,7,4,1,3, %U A377731 6,2,3,6,9,1,1,7,4,9,3,3,0,4,4,7,6,3,6,2,4,8,2,2,0,0,4,9,5,8,6,3,0,3,7,0,2 %N A377731 Decimal expansion of 4 * sqrt(2*Pi) * Gamma(5/4) / (3 * Gamma(3/4)). %C A377731 This constant appears in asymptotic formulas related to A211996 and A377732. %H A377731 Jean-Marie De Koninck, A. Arthur Bonkli Razafindrasoanaivolala, and Hans Schmidt Ramiliarimanana, <a href="https://doi.org/10.1007/s40993-024-00520-x">Integers with a sum of co-divisors yielding a square</a>, Research in Number Theory, Vol. 10, No. 2 (2024), Article 30; <a href="https://www.jeanmariedekoninck.mat.ulaval.ca/fileadmin/Documents/Publications/2023_integers_with_a_sum_of_co-divisors_yielding_a_square.pdf">author's copy</a>. %e A377731 2.47209956973516255791180046292701339495679843136235... %t A377731 RealDigits[4 * Sqrt[2*Pi] * Gamma[5/4] / (3 * Gamma[3/4]), 10, 120][[1]] %o A377731 (PARI) 4 * sqrt(2*Pi) * gamma(5/4) / (3 * gamma(3/4)) %Y A377731 Cf. A019727, A068465, A068467, A211996, A377732. %K A377731 nonn,cons %O A377731 1,1 %A A377731 _Amiram Eldar_, Nov 05 2024