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A039828 Largest coefficient in expansion of Product_{i=1..n} (1 + (-q)^i). 2
1, 1, 1, 2, 3, 5, 8, 14, 23, 40, 69, 123, 221, 397, 722, 1314, 2410, 4441, 8215, 15260, 28460, 53222, 99820, 187692, 353743, 668273, 1264854, 2399207, 4559828, 8679280, 16547220, 31592878, 60400688, 115633260, 221625505, 425313967 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..36.

PROG

(PARI) a(n) = vecmax(Vec(prod(i = 1, n, (1 + (-q)^i)))); \\ Michel Marcus, Aug 30 2018

CROSSREFS

Cf. A025591, A039829.

Sequence in context: A191317 A218020 A318520 * A246360 A005627 A191794

Adjacent sequences:  A039825 A039826 A039827 * A039829 A039830 A039831

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified December 7 09:33 EST 2019. Contains 329843 sequences. (Running on oeis4.)