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

1,2

Comments

Is this a permutation of the positive integers ?

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

Links

Paul Tek, Table of n, a(n) for n = 1..10000

Paul Tek, Perl program for this sequence

Example

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

Prog

(Perl) See Link section.

Crossrefs

Cf. A081145, A175498, A230383, A230455.

Sequence in context: A329479 A355057 A236111 * A141126 A056520 A289961

Adjacent sequences: A230452 A230453 A230454 * A230456 A230457 A230458

Keyword

nonn

Author

Paul Tek, Oct 19 2013

Status

approved