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 A088520 #6 Mar 30 2012 18:39:59 %S A088520 1,5,2,7,4,3,11,8,6,13,10,9,17,14,12,19,16,15,23,20,18,25,22,21,29,26, %T A088520 24,31,28,27,35,32,30,37,34,33,41,38,36,43,40,39,47,44,42,49,46,45,53, %U A088520 50,48,55,52,51,59,56,54,61,58,57,65,62,60,67,64,63,71,68,66,73,70,69 %N A088520 Permutation of natural numbers generated by 3-rowed array shown below. %C A088520 1 5 7 11 13 17 19 23 25 29 31 35 37 41 43... %C A088520 2 4 8 10 14 16 20 22 26 28 32 34 38 40 44... %C A088520 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45... %D A088520 M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988 %D A088520 Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997 %Y A088520 Cf. A090243, A090298, A092260, A113807. %K A088520 easy,nonn %O A088520 1,2 %A A088520 _Giovanni Teofilatto_, Nov 14 2003 %E A088520 Corrected and extended by _Ray Chandler_, Nov 16 2003