id:A113456 - OEIS Search Results

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Square array read by antidiagonals: a(n, d) is the smallest number that begins an arithmetic progression with common difference d of n numbers with the same prime signature.

+0
4

1, 2, 1, 33, 3, 1, 19940, 3, 2, 1, 204323, 213, 155, 3, 1, 380480345, 213, 7572, 3, 2, 1 (list; table; graph; listen)

	OFFSET	`1,2`
	COMMENT	`First two columns are A034173 and A113457. First three rows are A000012, A086489 and A113458.`
	EXAMPLE	`a(3, 2) = 3 because 3, 5 and 7 have the same prime signature.`
	CROSSREFS	`Sequence in context: A016547 A081541 A113465 this_sequence A127608 A038022 A038021` `Adjacent sequences: A113453 A113454 A113455 this_sequence A113457 A113458 A113459`
	KEYWORD	`nonn,tabl,less`
	AUTHOR	`David Wasserman (dwasserm(AT)earthlink.net), Jan 08 2006; corrected Jan 08 2006.`

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

AT&T Labs Research