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 A159403 #10 Dec 22 2023 10:54:11 %S A159403 16,6300,2313824,958814800,344874634776,94238931103688, %T A159403 17587610284856640,2081480274802819080,154433611467392996200, %U A159403 7500926051791640560840,253440319439897133594336,6305930304447589335730756 %N A159403 Number of n X n arrays of squares of integers summing to 19. %C A159403 All such sequences have holonomic recurrences (cf. comment in A159359). - _Georg Fischer_, Feb 17 2022 %H A159403 R. H. Hardin, <a href="/A159403/b159403.txt">Table of n, a(n) for n = 2..100</a> %H A159403 Vaclav Kotesovec, <a href="/A159403/a159403.txt">G.f. for A159403</a> %H A159403 <a href="/index/Rec#order_39">Index entries for linear recurrences with constant coefficients</a>, signature (39, -741, 9139, -82251, 575757, -3262623, 15380937, -61523748, 211915132, -635745396, 1676056044, -3910797436, 8122425444, -15084504396, 25140840660, -37711260990, 51021117810, -62359143990, 68923264410, -68923264410, 62359143990, -51021117810, 37711260990, -25140840660, 15084504396, -8122425444, 3910797436, -1676056044, 635745396, -211915132, 61523748, -15380937, 3262623, -575757, 82251, -9139, 741, -39, 1). %F A159403 G.f.: see link above. - _Vaclav Kotesovec_, Dec 04 2012 %K A159403 nonn %O A159403 2,1 %A A159403 _R. H. Hardin_, Apr 11 2009