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A025968
Expansion of 1/((1-2x)(1-4x)(1-6x)(1-10x)).
0
1, 22, 320, 3920, 44016, 471072, 4904320, 50237440, 509670656, 5141007872, 51677982720, 518395637760, 5193684791296, 51995352604672, 520305091051520, 5205162447994880, 52064302294695936, 520719124195049472
OFFSET
0,2
FORMULA
a(n) = -2^n/8 +8*4^n/3 -27*6^n/4 +125*10^n/24. - R. J. Mathar, Jun 20 2013
MATHEMATICA
CoefficientList[Series[1/((1-2x)(1-4x)(1-6x)(1-10x)), {x, 0, 30}], x] (* or *) LinearRecurrence[{22, -164, 488, -480}, {1, 22, 320, 3920}, 30] (* Harvey P. Dale, Dec 30 2014 *)
CROSSREFS
Sequence in context: A025972 A028029 A022453 * A025948 A021904 A022343
KEYWORD
nonn,easy
AUTHOR
STATUS
approved