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A028218
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Expansion of 1/((1-6x)(1-9x)(1-11x)(1-12x)).
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1, 38, 913, 17738, 304549, 4824806, 72271081, 1039149506, 14486436877, 197162419454, 2632865400529, 34623882428954, 449653998040885, 5779288950415382, 73637791767193657, 931419802216938482
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| a(n) = 23*a(n-1) - 132*a(n-2) + 3^n*(3^(n+1) - 2^(n+1)), a(0)=1, a(1)=38. - Vincenzo Librandi, Mar 14 2011
a(n) = 38*a(n-1) - 531*a(n-2) + 3222*a(n-3) - 7128*a(n-4), a(0)=1, a(1)=38, a(2)=913, a(3)=17738. - Vincenzo Librandi, Mar 14 2011
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CROSSREFS
| Sequence in context: A016075 A028226 A028224 * A028199 A098612 A137030
Adjacent sequences: A028215 A028216 A028217 * A028219 A028220 A028221
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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