id:A092739 - OEIS Search Results

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Numbers n such that n*(n+1)/2 is the juxtaposition of two identical strings in binary representation.

+0
1

2, 4, 5, 8, 9, 16, 17, 32, 33, 44, 64, 65, 90, 128, 129, 171, 256, 257, 512, 513, 702, 1024, 1025, 2048, 2049, 2732, 4096, 4097, 5542, 8192, 8193, 10923, 16384, 16385, 17515, 22939, 32768, 32769, 40050, 43361, 65536, 65537, 131072, 131073, 174764 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`2^n are terms for n>0 (A000079), 2^n + 1 are terms for n>1 (A000051).`
	EXAMPLE	`17(17+1)/2= 153 = 92^4 + 9 -> '10011001' -> '1001''1001', therefore 17 is a term.`
	CROSSREFS	`Cf. A020330, A000217, A007088.` `Adjacent sequences: A092736 A092737 A092738 this_sequence A092740 A092741 A092742` `Sequence in context: A064573 A065300 A080403 this_sequence A101394 A095031 A100598`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 12 2004`

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Last modified October 13 09:05 EDT 2008. Contains 145008 sequences.

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