id:A103651 - OEIS Search Results

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The set N of numbers such that each positive integer can be written in the form p + n, where p is 0 or a prime and n in N, in an even number of ways.

+0
2

0, 2, 3, 4, 5, 12, 15, 19, 21, 24, 26, 30, 31, 32, 33, 37, 38, 40, 42, 43, 44, 47, 48, 49, 50, 51, 52, 53, 54, 60, 61, 68, 69, 71, 73, 74, 78, 79, 80, 82, 84, 85, 87, 90, 94, 103, 107, 110, 111, 115, 117, 120, 124, 127, 136, 140, 141, 142, 143, 144, 145, 146, 147, 150, 156, 157 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`The terms are the exponents in the expansion of 1/S read mod 2 where S = 1 + Sum_{p prime} x^p.`
	CROSSREFS	`Cf. A108345, A132229.` `Sequence in context: A050745 A077375 A132027 this_sequence A093713 A057472 A117577` `Adjacent sequences: A103648 A103649 A103650 this_sequence A103652 A103653 A103654`
	KEYWORD	`nonn`
	AUTHOR	`Nadia Heninger (nadiah(AT)cs.princeton.edu) and N. J. A. Sloane (njas(AT)research.att.com), Dec 16 2007`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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