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A066118
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(n!*(3*n-1))/2.
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1
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1, 5, 24, 132, 840, 6120, 50400, 463680, 4717440, 52617600, 638668800, 8382528000, 118313395200, 1787154969600, 28768836096000, 491685562368000, 8892185702400000, 169662903201792000, 3406062811447296000, 71770609241210880000, 1583819207322992640000
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,100
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FORMULA
| E.g.f.: (1+x/2)/(1-x)^2. - Len Smiley (smiley(AT)math.uaa.alaska.edu), Dec 06 2001
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PROG
| (PARI) { for (n=1, 100, write("b066118.txt", n, " ", (n!*(3*n - 1))/2) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Feb 01 2010]
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CROSSREFS
| Sequence in context: A000349 A036919 A020067 * A002709 A193668 A009411
Adjacent sequences: A066115 A066116 A066117 * A066119 A066120 A066121
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KEYWORD
| nonn
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AUTHOR
| George E. Antoniou (george.antoniou(AT)montclair.edu), Dec 05 2001
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