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A230383 Lexicographically earliest sequence of distinct positive integers such that the first difference contains only distinct positive or negative squares. 3
1, 2, 6, 5, 14, 10, 26, 17, 42, 78, 29, 4, 53, 37, 101, 20, 120, 56, 137, 16, 160, 60, 24, 145, 314, 25, 221, 52, 277, 21, 310, 85, 341, 197, 521, 80, 441, 41, 482, 121, 605, 76, 476, 152, 681, 105, 730, 54, 630, 146, 822, 38, 767, 142, 926, 1767, 3, 903, 62 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Is this a permutation of the positive integers ?

Will every square show up in the first difference ?

LINKS

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

Paul Tek, Perl program for this sequence

EXAMPLE

n  a(n)   First difference

-  ----   ----------------

1     1

          +1^2

2     2

          +2^2

3     6

          -1^2

4     5

          +3^2

5    14

          -2^2

6    10

          +4^2

7    26

          ...

PROG

(Perl) See Link section.

CROSSREFS

Cf. A081145, A175498, A230455, A230560.

Sequence in context: A193977 A092313 A318358 * A009460 A085205 A094595

Adjacent sequences:  A230380 A230381 A230382 * A230384 A230385 A230386

KEYWORD

nonn

AUTHOR

Paul Tek, Oct 17 2013

STATUS

approved

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Last modified October 17 08:36 EDT 2019. Contains 328107 sequences. (Running on oeis4.)