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A035433 Number of partitions of n into parts 7k+2 or 7k+5. 2
1, 0, 1, 0, 1, 1, 1, 1, 1, 2, 2, 2, 3, 2, 4, 3, 5, 4, 6, 6, 7, 8, 8, 10, 11, 12, 14, 14, 18, 17, 22, 21, 26, 27, 30, 34, 36, 41, 44, 48, 54, 56, 66, 66, 78, 80, 91, 97, 106, 116, 124, 137, 147, 159, 175, 184, 207, 215, 241, 252, 279, 297, 321, 348, 371, 404, 432, 464, 503 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,10

COMMENTS

Convolution of A109707 and A109704. - Vaclav Kotesovec, Jan 21 2017

LINKS

Vaclav Kotesovec, Table of n, a(n) for n = 0..10000

FORMULA

a(n) ~ exp(2*Pi*sqrt(n/21)) / (4 * 21^(1/4) * cos(3*Pi/14) * n^(3/4)) * (1 + (11*Pi/(84*sqrt(21)) - 3*sqrt(21)/(16*Pi)) / sqrt(n)). - Vaclav Kotesovec, Aug 26 2015, extended Jan 24 2017

MATHEMATICA

nmax = 100; CoefficientList[Series[Product[1/((1 - x^(7k+2))*(1 - x^(7k+5))), {k, 0, nmax}], {x, 0, nmax}], x] (* Vaclav Kotesovec, Aug 26 2015 *)

CROSSREFS

Sequence in context: A171239 A029210 A321909 * A029199 A121611 A300066

Adjacent sequences:  A035430 A035431 A035432 * A035434 A035435 A035436

KEYWORD

nonn

AUTHOR

Olivier Gérard

EXTENSIONS

Prepended a(0)=1 from Vaclav Kotesovec, Jan 23 2017

STATUS

approved

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Last modified November 27 03:27 EST 2020. Contains 338677 sequences. (Running on oeis4.)