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 A230455 #11 Oct 25 2013 12:26:05 %S A230455 1,2,6,15,31,56,7,43,107,26,126,5,149,318,29,225,450,9,265,589,13,374, %T A230455 774,45,529,1058,34,659,1335,39,823,1664,64,964,3,1092,2248,132,1357, %U A230455 2726,22,1466,2987,71,1752,3516,35,1884,3820,99,2124,4333,108,2412 %N A230455 Lexicographically earliest sequence of distinct positive integers such that the absolute value of the first difference contains only distinct squares. %C A230455 Is this a permutation of the positive integers ? %C A230455 Will every square show up in the absolute value of the first difference ? %H A230455 Paul Tek, <a href="/A230455/b230455.txt">Table of n, a(n) for n = 1..10000</a> %H A230455 Paul Tek, <a href="/A230455/a230455.txt">Perl program for this sequence</a> %e A230455 The first differences of 1, 2, 6, 15, 31,... are 1^2, 2^2, 3^2, 4^2, 5^2, 7^2, 6^2,... %o A230455 (Perl) See Link section. %Y A230455 Cf. A081145, A175498, A230383, A230455. %K A230455 nonn %O A230455 1,2 %A A230455 _Paul Tek_, Oct 19 2013