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A014648 Number of partitions of n into its divisors with at least one part of size 1. +0
2
1, 1, 1, 2, 1, 5, 1, 6, 3, 8, 1, 33, 1, 11, 11, 26, 1, 66, 1, 76, 15, 17, 1, 378, 5, 20, 18, 136, 1, 648, 1, 166, 23, 26, 23, 1954, 1, 29, 27, 1212, 1, 1500, 1, 309, 261, 35, 1, 8600, 7, 378, 35, 422, 1, 2877, 35, 2803, 39, 44, 1, 66129, 1, 47, 461, 1626, 41, 4936 (list; graph; listen)
OFFSET

1,4

FORMULA

Coefficient of x^(n-1) in expansion of 1/Product_{d divides n} (1-x^d). - Vladeta Jovovic (vladeta(AT)Eunet.yu), Apr 11 2004

CROSSREFS

Cf. A018818.

Sequence in context: A060448 A090080 A014650 this_sequence A036073 A124227 A064865

Adjacent sequences: A014645 A014646 A014647 this_sequence A014649 A014650 A014651

KEYWORD

nonn

AUTHOR

Olivier Gerard (ogerard(AT)ext.jussieu.fr)

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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