id:A086491 - OEIS Search Results

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Group the natural numbers such that the n-th group sum is divisible by prime(n): (1, 2, 3), (4, 5), (6, 7, 8, 9), (10, 11), (12, 13, 14, 15, 16, 17, 18, 19, 20, 21), ... Sequence contains the sum of the terms in the n-th group.

+0
3

6, 9, 30, 21, 165, 234, 238, 38, 690, 522, 2325, 4107, 4018, 4988, 564, 9540, 708, 3172, 9380, 21726, 8395, 14615, 1245, 25365, 11155, 8585, 1545, 19795, 55154, 44070, 78486, 64714, 1781, 21684, 102661, 75047, 14287, 81011, 190380, 153624, 249526 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(4) = 10+11 = 21 is divisible by 7 = prime(4).`
	CROSSREFS	`Cf. A086492, A086493.` `Sequence in context: A025493 A054871 A091519 this_sequence A147415 A105866 A084007` `Adjacent sequences: A086488 A086489 A086490 this_sequence A086492 A086493 A086494`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 28 2003`
	EXTENSIONS	`More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Sep 16 2003`

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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.

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