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 A225515 #6 May 09 2013 19:20:31 %S A225515 2,1,2,2,1,2,2,1,2,2,1,2,2,2,1,2,2,1,2,2,2,1,2,2,1,2,2,2,1,2,2,2,1,2, %T A225515 2,2,1,2,2,2,1,2,2,2,1,2,2,2,2,1,2,2,2,1,2,2,2,1,2,2,2,2,1,2,2,2,1,2, %U A225515 2,2,1,2,2,2,2,1,2,2,2,1,2,2,2,2,1,2,2 %N A225515 First differences of A121347. %C A225515 Apparently a(n) = 1 or 2. From first 10000 terms, 8597 terms = 2. %H A225515 Zak Seidov, <a href="/A225515/b225515.txt">Table of n, a(n) for n = 1..10000</a> %F A225515 a(n) = A121347(n+2) - A121347(n+1). %t A225515 s={2}; f1=4; f2=2; k=2; Do[f1=f1*n^2; While[f2<f1, k++; f2=f2*k]; AppendTo[s,k-1], {n,3,100}]; Rest[s]-Most[s] %Y A225515 Cf. A121347. %K A225515 nonn %O A225515 1,1 %A A225515 _Zak Seidov_, May 09 2013