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 A219961 #5 Dec 04 2012 14:06:50 %S A219961 314,11,335,110,162,25,94,47,119,21,98,377,46,97,1,151,133,97,23,194, %T A219961 23,53,255,5,2,24,27,21,228,238,18,47,40,64,22,48,12,56,107,22,12,86, %U A219961 68,89,26,200,39,30,2,95,14,21,189,21,59,19,27,63,7,44,98,40 %N A219961 First differences of A219960. %C A219961 Conjecture: 1 appears infinitely often in this sequence (indicating an infinite number of pairs of consecutive integers in the parent sequence), despite very few appearances compared with A219552, which is derived from a very similar process. %H A219961 Carl R. White, <a href="/A219961/b219961.txt">Table of n, a(n) for n = 1..10000</a> %t A219961 f[n_] := Ceiling[Sqrt[n]]*(Ceiling[Sqrt[n]]^2 - n); t = Select[Range[10000], NestWhileList[f, #, UnsameQ, All][[-1]] > 0 &]; Differences[t] (* _T. D. Noe_, Dec 04 2012 *) %Y A219961 Cf. A219960, A219552, A219962 %K A219961 nonn %O A219961 1,1 %A A219961 _Carl R. White_, Dec 02 2012