A230455 Lexicographically earliest sequence of distinct positive integers such that the absolute value of the first difference contains only distinct squares.

1, 2, 6, 15, 31, 56, 7, 43, 107, 26, 126, 5, 149, 318, 29, 225, 450, 9, 265, 589, 13, 374, 774, 45, 529, 1058, 34, 659, 1335, 39, 823, 1664, 64, 964, 3, 1092, 2248, 132, 1357, 2726, 22, 1466, 2987, 71, 1752, 3516, 35, 1884, 3820, 99, 2124, 4333, 108, 2412

Offset: 1

Author

Paul Tek, Oct 19 2013

Keywords

• nonn

Comments

Is this a permutation of the positive integers ?

Will every square show up in the absolute value of the first difference ?

Examples

			The first differences of 1, 2, 6, 15, 31,... are 1^2, 2^2, 3^2, 4^2, 5^2, 7^2, 6^2,...
		

Links

• Paul Tek, Table of n, a(n) for n = 1..10000
• Paul Tek, Perl program for this sequence

Crossrefs

Cf. A081145, A175498, A230383, A230455.

Programs

Perl

See Link section.