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A046781
Number of partitions of n with equal nonzero number of parts congruent to each of 1, 2 and 3 (mod 4).
2
0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 4, 0, 1, 0, 11, 0, 4, 0, 26, 0, 14, 0, 55, 0, 38, 0, 110, 0, 94, 0, 212, 0, 209, 0, 397, 0, 441, 0, 729, 0, 878, 0, 1320, 0, 1685, 0, 2357, 0, 3121, 0, 4160, 0, 5633, 0, 7258, 0, 9923, 0, 12518, 0, 17153, 0, 21346, 0, 29133, 0, 35998, 0, 48766
OFFSET
0,11
LINKS
FORMULA
G.f.: (Sum_{k>0} x^(6*k)/(Product_{j=1..k} 1 - x^(4*j))^3)/(Product_{j>=0} 1 - x^(4*j+4)). - Andrew Howroyd, Sep 16 2019
PROG
(PARI) seq(n)={Vec(sum(k=1, n\6, x^(6*k)/prod(j=1, k, 1 - x^(4*j) + O(x*x^(n-6*k)))^3)/prod(j=0, n\4, 1 - x^(4*j+4) + O(x*x^n)), -(n+1))} \\ Andrew Howroyd, Sep 16 2019
CROSSREFS
Cf. A046787.
Sequence in context: A344373 A325873 A363973 * A244530 A372722 A271424
KEYWORD
nonn
STATUS
approved