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 A011852 #17 Jun 13 2023 11:13:09 %S A011852 0,0,0,0,0,0,0,1,4,14,35,77,154,286,500,834,1334,2062,3094,4522,6460, %T A011852 9044,12435,16824,22432,29516,38371,49335,62790,79170,98962,122713, %U A011852 151032,184594,224150,270526,324632 %N A011852 a(n) = floor(binomial(n,6)/6). %H A011852 <a href="/index/Rec#order_55">Index entries for linear recurrences with constant coefficients</a>, signature (7, -22, 41, -50, 41, -22, 7, 0, -6, 15, -19, 9, 9, -19, 15, -6, 0, 6, -15, 19, -9, -9, 19, -16, 13, -22, 35, -35, 22, -13, 16, -19, 9, 9, -19, 15, -6, 0, 6, -15, 19, -9, -9, 19, -15, 6, 0, -7, 22, -41, 50, -41, 22, -7, 1). %o A011852 (Sage) [floor(binomial(n,6)/6) for n in range(0,37)] # _Zerinvary Lajos_, Dec 01 2009 %o A011852 (PARI) a(n) = binomial(n, 6)\6; \\ _Michel Marcus_, Jan 28 2018 %Y A011852 A column of triangle A011857. %K A011852 nonn %O A011852 0,9 %A A011852 _N. J. A. Sloane_