id:A093641 - OEIS Search Results

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Numbers of form 2^i * prime(j), i>=0, j>0, together with 1.

+0
9

1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 16, 17, 19, 20, 22, 23, 24, 26, 28, 29, 31, 32, 34, 37, 38, 40, 41, 43, 44, 46, 47, 48, 52, 53, 56, 58, 59, 61, 62, 64, 67, 68, 71, 73, 74, 76, 79, 80, 82, 83, 86, 88, 89, 92, 94, 96, 97, 101, 103, 104, 106, 107, 109, 112 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n) is either 1, prime, or of form 2a(m), m<n.`
	EXAMPLE	`55 is not a member, as 511 is not of the from 2^i prime.`
	CROSSREFS	`A093640(a(n)) = A000005(a(n)); A000040 and A000079 are subsequences.` `A105440 is a subsequence, see also A105442. - Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Apr 09 2005` `Cf. A078822, A007088.` `Complement of A105441; A001221(a(n))<=2; A005087(a(n))<=1; A087436(a(n))<=1.` `See also A105442.` `Sequence in context: A106092 A121208 A123345 this_sequence A096157 A066522 A007298` `Adjacent sequences: A093638 A093639 A093640 this_sequence A093642 A093643 A093644`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Apr 07 2004`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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