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 A287701 #12 Mar 02 2025 16:37:12
%S A287701 0,1,2252,111753,1297504,7120505,25461756,70250257,163191008,
%T A287701 335493009,629597260,1100904761,1819504512,2871901513,4362744764,
%U A287701 6416555265,9179454016,12820890017,17535368268,23544177769,31097119520,40474234521,51987531772,65982716273,82840917024,102980415025,126858371276,154972554777
%N A287701 a(n) = (5!)^3 * [z^5] hypergeom([], [1,1], z)^n.
%H A287701 <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (6,-15,20,-15,6,-1).
%F A287701 O.g.f.: x*(1 + 2246*x + 98256*x^2 + 660746*x^3 + 966751*x^4) / (1 - x)^6.
%F A287701 a(n) = 163476*n - 375375*n^2 + 305500*n^3 - 108000*n^4 + 14400*n^5.
%F A287701 a(n) = [x^n] (x + 2246*x^2 + 98256*x^3 + 660746*x^4 + 966751*x^5) / (1 - x)^6.
%p A287701 a := n -> 163476*n - 375375*n^2 + 305500*n^3 - 108000*n^4 + 14400*n^5:
%p A287701 seq(a(n), n=0..27);
%t A287701 Table[163476 n - 375375 n^2 + 305500 n^3 - 108000 n^4 + 14400 n^5, {n, 0, 30}] (* _Bruno Berselli_, Jun 06 2017 *)
%t A287701 LinearRecurrence[{6,-15,20,-15,6,-1},{0,1,2252,111753,1297504,7120505},30] (* _Harvey P. Dale_, Mar 02 2025 *)
%Y A287701 Column 5 of A287698.
%K A287701 nonn,easy
%O A287701 0,3
%A A287701 _Peter Luschny_, Jun 01 2017