id:A074765 - OEIS Search Results

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Number of composites that are a concatenation nk of n and k for values of k from 1 to n.

+0
1

0, 2, 2, 2, 4, 5, 5, 7, 8, 6, 10, 11, 10, 13, 12, 13, 15, 16, 14, 18, 18, 17, 20, 20, 22, 22, 22, 25, 26, 26, 26, 29, 26, 30, 28, 31, 32, 33, 32, 34, 35, 35, 37, 39, 40, 39, 42, 44, 42, 44, 48, 46, 49, 44, 50, 48, 49, 49, 53, 52, 52, 56, 53, 57, 57, 60, 60, 60, 61, 61, 65, 63 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(4) = 2 because we get composites 42 and 44 for 2 values of k, i.e. k = 2, 4.`
	CROSSREFS	`Cf. A068696.` `Sequence in context: A032578 A035659 A008282 this_sequence A029045 A152432 A057591` `Adjacent sequences: A074762 A074763 A074764 this_sequence A074766 A074767 A074768`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Sep 06 2002`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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