A298602 - OEIS

A298602

Expansion of (1 - x)*Product_{k>=1} (1 - x^prime(k)).

1, -1, -1, 0, 1, 0, 0, 0, 1, 0, -1, -1, 1, 0, 0, 0, 1, -1, 0, -1, 1, 0, 0, -1, 2, 0, -1, -1, 1, -1, 1, -1, 2, 0, 0, -2, 2, -2, 0, 0, 3, -2, 1, -2, 2, -1, 0, -3, 5, -1, 0, -3, 3, -3, 3, -3, 3, -1, 2, -5, 6, -4, 1, -2, 6, -5, 3, -6, 5, -2, 4, -8, 9, -5, 3, -5, 7, -8, 7, -8, 8, -4, 5

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OFFSET

0,25

COMMENTS

The difference between the number of partitions of n into an even number of distinct prime parts (including 1) and the number of partitions of n into an odd number of distinct prime parts (including 1).

Convolution inverse of A034891.

LINKS

Table of n, a(n) for n=0..82.

Index entries for related partition-counting sequences

FORMULA

G.f.: (1 - x)*Product_{k>=1} (1 - x^prime(k)).

MATHEMATICA

nmax = 82; CoefficientList[Series[(1 - x) Product[(1 - x^Prime[k]), {k, 1, nmax}], {x, 0, nmax}], x]

CROSSREFS

Cf. A000586, A000607, A034891, A036497, A046675 (partial sums).

Sequence in context: A336865 A262257 A144474 * A203949 A070200 A359833

Adjacent sequences: A298599 A298600 A298601 * A298603 A298604 A298605

KEYWORD

sign

AUTHOR

Ilya Gutkovskiy, Jan 22 2018

STATUS

approved