id:A081871 - OEIS Search Results

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a(1)=1, a(n)=2*a(n-1)+1 if that number is composite, a(n)=a(n-1)+1 otherwise.

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1, 2, 3, 4, 9, 10, 21, 22, 45, 91, 183, 184, 369, 370, 741, 742, 1485, 1486, 2973, 5947, 118, 95, 23791, 47583, 95167, 190335, 380671, 761343, 1522687, 3045375, 3045376, 609075, 3, 12181507, 24363015, 48726031, 97452063, 194904127, 389808255 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n)=r(n)*2^b(n) where b(n) is an integer sequence and r(n) converges to 1.452148914690155834251....`
	CROSSREFS	`Sequence in context: A127150 A098548 A076963 this_sequence A068334 A118223 A093514` `Adjacent sequences: A081868 A081869 A081870 this_sequence A081872 A081873 A081874`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 12 2003`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

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