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A025967
Expansion of 1/((1-2x)(1-4x)(1-6x)(1-9x)).
0
1, 21, 289, 3321, 34705, 343257, 3282913, 30740457, 283960369, 2599944633, 23667405697, 214622461833, 1941330570193, 17530479823449, 158125883415841, 1425244488222249, 12839878208747377, 115635005126816505
OFFSET
0,2
FORMULA
a(n) = (8*9^(n+3)-35*6^(n+3)+42*4^(n+3)-15*2^(n+3))/840. - Yahia Kahloune, May 24 2013
CROSSREFS
Sequence in context: A316924 A317042 A317696 * A022452 A183731 A101703
KEYWORD
nonn,easy
AUTHOR
STATUS
approved