id:A118103 - OEIS Search Results

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First differences contain a(n) n's, in order, starting with a(0)=1.

+0
3

1, 1, 2, 4, 6, 9, 12, 15, 18, 22, 26, 30, 34, 38, 42, 47, 52, 57, 62, 67, 72, 77, 82, 87, 93, 99, 105, 111, 117, 123, 129, 135, 141, 147, 153, 159, 166, 173, 180, 187, 194, 201, 208, 215, 222, 229, 236, 243, 250, 257, 264, 272, 280, 288, 296, 304, 312, 320, 328, 336 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`a(261) = 2701 = a(260) + 15 is the first case where a(n) is relatively prime to the difference (a(n)-a(n-1)) when that difference is composite; a(263) = 2731 is the first prime in the sequence with a composite difference.`
	CROSSREFS	`Cf. A001462, A100143, A108104.` `Sequence in context: A143118 A162800 A083652 this_sequence A157795 A003066 A075349` `Adjacent sequences: A118100 A118101 A118102 this_sequence A118104 A118105 A118106`
	KEYWORD	`nonn`
	AUTHOR	`Frank Adams-Watters (FrankTAW(AT)Netscape.net), Apr 12 2006`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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