id:A054973 - OEIS Search Results

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Number of numbers whose divisors sum to n.

+0
10

1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 2, 1, 1, 1, 0, 0, 2, 0, 1, 0, 0, 0, 3, 0, 0, 0, 1, 0, 1, 2, 2, 0, 0, 0, 1, 0, 1, 1, 1, 0, 3, 0, 1, 0, 0, 0, 3, 0, 0, 0, 0, 0, 2, 0, 2, 1, 0, 0, 3, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 5, 0, 1, 0, 0, 0, 1, 0, 2, 0, 0, 0, 3, 0, 0, 0, 0, 0, 3, 1, 0, 1, 0, 0, 4, 0 (list; graph; listen)

	OFFSET	`1,12`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..10000`
	EXAMPLE	`a(12)=2 since 11 has factors 1 and 11 with 1+11=12 and 6 has factors 1, 2, 3 and 6 with 1+2+3+6=12`
	CROSSREFS	`Cf. A000203, A002191, A007609.` `Sequence in context: A111405 A089053 A068462 this_sequence A030351 A072617 A056226` `Adjacent sequences: A054970 A054971 A054972 this_sequence A054974 A054975 A054976`
	KEYWORD	`nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), May 16 2000`

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

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