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 A145128 #7 Nov 05 2024 20:15:09 %S A145128 1,4,13,38,99,231,490,960,1761,3058,5071,8086,12467,18669,27252,38896, %T A145128 54417,74784,101137,134806,177331,230483,296286,377040,475345,594126, %U A145128 736659,906598,1108003,1345369,1623656,1948320,2325345,2761276,3263253,3839046,4497091 %N A145128 a(n) = 1 + (1200 + (634 + (225 + (85 + (15 + n)*n)*n)*n)*n)*n/720. %H A145128 Alois P. Heinz, <a href="/A145128/b145128.txt">Table of n, a(n) for n = 0..1000</a> %F A145128 G.f.: (x^4-4*x^3+6*x^2-3*x+1) / (1-x)^7. %p A145128 a := n-> 1+ (1200+ (634+ (225+ (85+ (15+ n) *n) *n) *n) *n) *n/720: seq (a(n), n=0..40); %Y A145128 7th row of A145153. See row 7 of A145140/A145141 for rational coefficients and A145142 for 720 * coefficients of polynomial. %K A145128 nonn,easy %O A145128 0,2 %A A145128 _Alois P. Heinz_, Oct 03 2008