login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A328547 Number of 3-regular bipartitions of n. 5
1, 2, 5, 8, 16, 26, 44, 68, 108, 162, 245, 356, 521, 740, 1053, 1468, 2045, 2804, 3836, 5184, 6988, 9326, 12409, 16376, 21546, 28154, 36674, 47492, 61317, 78764, 100880, 128628, 163553, 207134, 261630, 329288, 413395, 517316, 645803, 803844, 998282 (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..40.

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(3);

CROSSREFS

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

Sequence in context: A171238 A096541 A226015 * A137685 A169826 A093065

Adjacent sequences:  A328544 A328545 A328546 * A328548 A328549 A328550

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Oct 19 2019

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 19 12:51 EDT 2021. Contains 345129 sequences. (Running on oeis4.)