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 A144022 #4 Mar 30 2012 18:52:27 %S A144022 0,4,5,6,10,7,13,18,7,12,3,11,22,27,11,17,1,51,9,35,32,4,26,4,11,40,3, %T A144022 5,43,56,85,6,12,57,35,67,0,105,3,21,67,2,42,1,55,19,88,9,49,59,97,6, %U A144022 9,102,87,12,49,0,101,36,107,35,26,63,15,6,97,27,6,129,33,128,21,62,121 %N A144022 (1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2*5, 11, 2^2*3, 13, 2*7, 3*5,..) becomes (abs(1-2+3-2, 2-5+2-3, 7-2+3-3, 2-2+5-11, 2-2+3-13, 2-7+3-5,..)). %e A144022 Abs (2-7+3-5)=abs (-7) =7=a(6). %e A144022 Abs (2-4+17-2)=abs(13)=13=a(7). %e A144022 Abs (3-2+19-2)=abs (18)=18=a(8). %e A144022 Abs (2-5+3-7)=abs (-7)=7=a(9). %e A144022 Abs (2-11+23-2)=abs(12)=12=a(10), %e A144022 etc. %Y A144022 Cf. A141287, A141261, A136678, A143717. %K A144022 nonn %O A144022 1,2 %A A144022 _Juri-Stepan Gerasimov_, Nov 17 2008 %E A144022 Corrected (11 replaced by 9, 5 replaced by 6, 104 by 102) by _R. J. Mathar_, Apr 18 2010