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A028039
Expansion of 1/((1-3x)(1-4x)(1-7x)(1-9x)).
0
1, 23, 342, 4198, 46403, 481341, 4792264, 46410716, 440901285, 4131534979, 38331795866, 353038275954, 3233774790247, 29499248911337, 268261230188748, 2433731253526312, 22039259605258889, 199303153044040815
OFFSET
0,2
FORMULA
a(n)=(2*9^(n+3)-5*7^(n+3)+8*4^(n+3)-5*3^(n+3))/120. [Yahia Kahloune, May 31 2013]
MATHEMATICA
CoefficientList[Series[1/((1-3x)(1-4x)(1-7x)(1-9x)), {x, 0, 30}], x] (* or *) LinearRecurrence[ {23, -187, 633, -756}, {1, 23, 342, 4198}, 30] (* Harvey P. Dale, Sep 18 2022 *)
CROSSREFS
Sequence in context: A299710 A028055 A026324 * A002118 A025993 A111875
KEYWORD
nonn,easy
AUTHOR
STATUS
approved