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A021364
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Expansion of 1/((1-x)(1-3x)(1-4x)(1-7x)).
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0
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1, 15, 150, 1270, 9891, 73605, 533800, 3814140, 27018981, 190442395, 1338423450, 9390536610, 65820843271, 461096642385, 3229086629100, 22609268456680, 158287591978761, 1108104188689575, 7757094081310750
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| a(0)=1, a(1)=15, a(2)=150, a(3)=1270, a(n)=15*a(n-1)-75*a(n-2)+ 145*a(n-3)-84*a(n-4) [From Harvey P. Dale, June 09 2011]
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MATHEMATICA
| CoefficientList[Series[1/((1-x)(1-3x)(1-4x)(1-7x)), {x, 0, 20}], x] (* or *) LinearRecurrence[{15, -75, 145, -84}, {1, 15, 150, 1270}, 20] (* From Harvey P. Dale, June 09 2011 *)
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CROSSREFS
| Sequence in context: A085375 A081135 A084902 * A206366 A016103 A206361
Adjacent sequences: A021361 A021362 A021363 * A021365 A021366 A021367
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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