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 A025494 #27 Mar 19 2025 08:24:19 %S A025494 1,4,9,25,121,144,729,841,5041,5184,45369,46225,363609,403225,3674889, %T A025494 1401602635449 %N A025494 Squares which are the sum of factorials of distinct integers (probably finite). %C A025494 No other elements < 31!. - Paul.Jobling(AT)WhiteCross.com, Aug 10 2000 %C A025494 If there are any terms in either A014597 or A025494 beyond the last one given (i.e., n = 1183893 in A014597; equivalently n^2 = 1401602635449 in A025494), then n^2 must be greater than 48! (about 1.24139*10^61). - _Jon E. Schoenfield_, Aug 04 2006 %H A025494 Shyam Sunder Gupta, <a href="https://doi.org/10.1007/978-981-97-2465-9_16">Fascinating Factorials</a>, Exploring the Beauty of Fascinating Numbers, Springer (2025) Ch. 16, 411-442. %Y A025494 Cf. A002034, A018194, A051760, A051761, A014597, A059589. %Y A025494 Subsequence of A059589. %K A025494 nonn %O A025494 1,2 %A A025494 _David W. Wilson_