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 A143169 #8 Jun 18 2017 07:34:23 %S A143169 1,30,825,24150,775845,27478710,1069801425,45547251750,2108878296525, %T A143169 105616706545350,5693005525232025,328784072492625750, %U A143169 20261087389388971125,1327378299252353097750,92142485069345244158625,6756933615539839013031750,522007423480304780922028125 %N A143169 Fourth column of triangle A000369: |S2(-3;n+4,4)|. %C A143169 Also third column (m=3) of triangle A049029 (S2(5)). %F A143169 a(n) = A000369(n+4,4) = |S2(-3;n+4,4)|, n >= 0. %F A143169 E.g.f.: d^4/dx^4 ((1-(1-4*x)^(1/4))^4)/4! = (-1/2)*(-45*(1-4*x)^(1/2)+120*(1-4*x)^(1/4)-77)/(1-4*x)^(15/4). %Y A143169 Third column of A000369 is A143168, fifth one is A143170. %Y A143169 Also third column (m=3) of triangle A049029 (S2(5)). - _Wolfdieter Lang_, Nov 17 2008 %K A143169 nonn,easy %O A143169 0,2 %A A143169 _Wolfdieter Lang_, Sep 15 2008