id:A084088 - OEIS Search Results

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a(n) = 2 mod 3 and exponent of highest power of 2 dividing a(n) is even.

+0
3

5, 11, 17, 20, 23, 29, 35, 41, 44, 47, 53, 59, 65, 68, 71, 77, 80, 83, 89, 92, 95, 101, 107, 113, 116, 119, 125, 131, 137, 140, 143, 149, 155, 161, 164, 167, 173, 176, 179, 185, 188, 191, 197, 203, 209, 212, 215, 221, 227, 233, 236, 239, 245 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`a(n) is both in A016789 and A003159.` `It seems that lim(n->inf, a(n)/n) = 9/2.` `Positions of -1 in expansion of sum(k>=0, x^2^k/(1+x^2^k+x^2^(k+1))) (A084091).`
	PROGRAM	`(PARI) for(n=0, 300, if(valuation(n, 2)%2==0&&n%3==2, print1(n", ")))`
	CROSSREFS	`Sequence in context: A081717 A096264 A088348 this_sequence A032646 A123083 A107745` `Adjacent sequences: A084085 A084086 A084087 this_sequence A084089 A084090 A084091`
	KEYWORD	`nonn`
	AUTHOR	`Ralf Stephan (ralf(AT)ark.in-berlin.de), May 11 2003`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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