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A100932 Number of partitions of n such that multiplicities of parts are divisors of n. 0
1, 2, 3, 5, 4, 10, 6, 17, 14, 26, 13, 66, 19, 63, 60, 126, 39, 243, 55, 338, 179, 310, 105, 1154, 209, 637, 482, 1458, 257, 3329, 341, 2878, 1200, 2386, 1178, 11262, 761, 4400, 2834, 14512, 1261, 23052, 1611, 18255, 10551, 13858, 2591, 83810, 4678, 38243 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..50.

Martin Klazar, What is an answer? — remarks, results and problems on PIO formulas in combinatorial enumeration, part I, arXiv:1808.08449, 2018.

FORMULA

Coefficient of x^n in expansion of Product_{k=1..n} (1+Sum_{d|n} x^(d*k)).

MAPLE

with(numtheory): seq(coeff(mul(1+add(x^(d*k), d=divisors(n)), k=1..n), x, n), n=1..60); (C. Ronaldo)

CROSSREFS

Cf. A018818.

Sequence in context: A069202 A244984 A247225 * A064360 A075158 A215526

Adjacent sequences:  A100929 A100930 A100931 * A100933 A100934 A100935

KEYWORD

easy,nonn

AUTHOR

Vladeta Jovovic, Jan 11 2005

EXTENSIONS

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 19 2005

STATUS

approved

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Last modified July 4 16:24 EDT 2020. Contains 335448 sequences. (Running on oeis4.)