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A328548 Number of 6-regular bipartitions of n. 5
1, 2, 5, 10, 20, 36, 63, 106, 175, 280, 441, 680, 1034, 1548, 2290, 3346, 4840, 6930, 9837, 13844, 19337, 26810, 36925, 50530, 68741, 92984, 125113, 167490, 223155, 295960, 390825, 513954, 673214, 878480, 1142190, 1479892, 1911051, 2459896, 3156602 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

Kathiravan, T., and S. N. Fathima. "On L-regular bipartitions modulo L." The Ramanujan Journal 44.3 (2017): 549-558.

LINKS

Table of n, a(n) for n=0..38.

MAPLE

f:=(k, M) -> mul(1-q^(k*j), j=1..M);

LRBP := (L, M) -> (f(L, M)/f(1, M))^2;

S := L -> seriestolist(series(LRBP(L, 80), q, 60));

S(6);

CROSSREFS

Number of r-regular bipartitions of n for r = 2,3,4,5,6: A022567, A328547, A001936, A263002, A328548.

Sequence in context: A160461 A117487 A263348 * A294536 A325650 A325720

Adjacent sequences:  A328545 A328546 A328547 * A328549 A328550 A328551

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 19 2019

STATUS

approved

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Last modified June 15 15:16 EDT 2021. Contains 345049 sequences. (Running on oeis4.)