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 A095670 #5 Oct 12 2012 14:40:21 %S A095670 4,29,120,372,960,2178,4488,8580,15444,26455,43472,68952,106080, %T A095670 158916,232560,333336,468996,648945,884488,1189100,1578720,2072070, %U A095670 2691000,3460860,4410900,5574699,6990624,8702320,10759232,13217160,16138848 %N A095670 Eighth column (m=7) of (1,4)-Pascal triangle A095666. %C A095670 If Y is a 4-subset of an n-set X then, for n>=10, a(n-10) is the number of 7-subsets of X having at most one element in common with Y. - _Milan Janjic_, Dec 08 2007 %F A095670 G.f.: (4-3*x)/(1-x)^8. %F A095670 a(n) = 4*b(n)-3*b(n-1) =(n+28)*binomial(n+6, 6)/7, with b(n):=binomial(n+7, 7)= A000580(n+7, 7). %K A095670 nonn,easy %O A095670 0,1 %A A095670 _Wolfdieter Lang_, Jun 11 2004