id:A056190 - OEIS Search Results

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Sum{binomial[n,d]: d|n and GCD[d, n/d]=1}

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1, 3, 4, 5, 6, 42, 8, 9, 10, 308, 12, 728, 14, 3538, 3474, 17, 18, 48792, 20, 20370, 117632, 705686, 24, 737520, 26, 10400952, 28, 1204544, 30, 185903342, 32, 33, 193542210, 2333606816, 7049188, 94202222, 38, 35345264542, 8122434623 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(n)=A056045(n) for square-free n, when all divisors are unitary; n=100 has 9 divisors of which {1,4,25,100} are unitary. so a(100)=100+3921225+242519269720337121015504+1`
	CROSSREFS	`A056045.` `Sequence in context: A107228 A083401 A083400 this_sequence A049465 A071054 A033545` `Adjacent sequences: A056187 A056188 A056189 this_sequence A056191 A056192 A056193`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Aug 02 2000`

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Last modified July 4 18:25 EDT 2008. Contains 140886 sequences.

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