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A278400 G.f.: Im((i; x)_inf), where (a; q)_inf is the q-Pochhammer symbol, i = sqrt(-1). 12
-1, -1, -1, 0, 0, 1, 2, 3, 4, 6, 6, 8, 9, 10, 10, 11, 10, 10, 8, 6, 2, 0, -7, -12, -20, -28, -39, -48, -62, -74, -90, -104, -122, -136, -156, -171, -190, -204, -222, -232, -247, -252, -260, -258, -258, -244, -232, -204, -176, -130, -84, -15, 54, 148, 244, 368 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,7

COMMENTS

The q-Pochhammer symbol (a; q)_inf = Product_{k>=0} (1 - a*q^k).

LINKS

Seiichi Manyama, Table of n, a(n) for n = 0..10000

Eric Weisstein's World of Mathematics, q-Pochhammer Symbol.

FORMULA

(i; x)_inf is the g.f. for A278399(n) + i*a(n).

MATHEMATICA

Im[(QPochhammer[I, x] + O[x]^60)[[3]]]

CROSSREFS

Cf. A278399, A278401, A278402, A278420.

Sequence in context: A142727 A112275 A306974 * A239492 A034298 A308162

Adjacent sequences:  A278397 A278398 A278399 * A278401 A278402 A278403

KEYWORD

sign

AUTHOR

Vladimir Reshetnikov, Nov 20 2016

STATUS

approved

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Last modified April 6 11:51 EDT 2020. Contains 333273 sequences. (Running on oeis4.)