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A039828 Largest coefficient in expansion of Product_{i=1..n} (1 + (-q)^i). 7
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
FORMULA
a(n) ~ sqrt(3) * 2^(n + 1/2) / (sqrt(Pi) * n^(3/2)). - Vaclav Kotesovec, Feb 04 2022
PROG
(PARI) a(n) = vecmax(Vec(prod(i = 1, n, (1 + (-q)^i)))); \\ Michel Marcus, Aug 30 2018
CROSSREFS
Sequence in context: A191317 A218020 A318520 * A357303 A246360 A005627
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified March 4 05:23 EST 2024. Contains 370522 sequences. (Running on oeis4.)