id:A132229 - OEIS Search Results

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The set N such that each positive integer can be written in the form s^2 + n, s>=0, n in N, in an odd number of ways.

+0
4

2, 5, 6, 8, 13, 14, 15, 16, 18, 19, 20, 21, 22, 27, 28, 31, 35, 36, 39, 40, 45, 46, 49, 53, 54, 59, 60, 63, 64, 65, 66, 67, 68, 69, 70, 72, 79, 80, 83, 84, 85, 86, 89, 90, 97, 101, 102, 107, 108, 113, 114, 117, 118, 119, 120, 127, 137, 138, 149, 150, 153 (list; graph; listen)

	OFFSET	`1,1`
	REFERENCES	`Computed by Sam Taylor.`
	LINKS	`J. N. Cooper, D. Eichhorn and K. O'Bryant, Reciprocals of binary power series`
	FORMULA	`The terms are the exponents in the expansion of 1/((1-x)S) read mod 2 where S = Sum_{s >= 0} x^{s^2}.`
	CROSSREFS	`Cf. A108345.` `Sequence in context: A105107 A002253 A032716 this_sequence A028750 A028787 A028796` `Adjacent sequences: A132226 A132227 A132228 this_sequence A132230 A132231 A132232`
	KEYWORD	`nonn`
	AUTHOR	`Nadia Heninger (nadiah(AT)CS.Princeton.EDU), Dec 13 2007`

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Last modified December 3 01:16 EST 2008. Contains 151161 sequences.

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