id:A113470 - OEIS Search Results

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Triangle read by rows: n-th row is the smallest set of n numbers in arithmetic progression with the same number of divisors.

+0
4

1, 2, 3, 3, 5, 7, 5, 11, 17, 23, 5, 11, 17, 23, 29, 7, 37, 67, 97, 127, 157, 35, 65, 95, 125, 155, 185, 215, 635, 707, 779, 851, 923, 995, 1067, 1139, 635, 707, 779, 851, 923, 995, 1067, 1139, 1211, 199, 409, 619, 829, 1039, 1249, 1459, 1669, 1879, 2089, 3841, 3973 (list; table; graph; listen)

	OFFSET	`1,2`
	COMMENT	`In this sequence "smallest" means that the last term of the arithmetic progression is minimized and if there is still a choice then we minimize the common difference of the arithmetic progression.`
	FORMULA	`T(n,k)=A090547(n)+(k-1)*A090549(n). - R. J. Mathar, May 11 2007`
	CROSSREFS	`Cf. A086786, A090547, A090548, A090549.` `Sequence in context: A084127 A089934 A113460 this_sequence A086786 A047844 A081217` `Adjacent sequences: A113467 A113468 A113469 this_sequence A113471 A113472 A113473`
	KEYWORD	`nonn,tabl`
	AUTHOR	`David Wasserman (dwasserm(AT)earthlink.net), Jan 08 2006`

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.

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