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A066114
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a(0) = 1; for n > 0, a(n) = (n!*(3*n+1))/2.
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1
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1, 2, 7, 30, 156, 960, 6840, 55440, 504000, 5080320, 56246400, 678585600, 8861529600, 124540416000, 1874333260800, 30076510464000, 512608352256000, 9247873130496000, 176065276907520000, 3527707911856128000, 74203511249387520000
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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LINKS
| Harry J. Smith, Table of n, a(n) for n=0,...,100
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MATHEMATICA
| Join[{1}, Table[(n!(3n+1))/2, {n, 20}]] (* From Harvey P. Dale, June 15 2011 *)
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PROG
| (PARI) { for (n=0, 100, a=(n!*(3*n + 1))/2; if (n==0, a=1); write("b066114.txt", n, " ", a) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Feb 01 2010]
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CROSSREFS
| Sequence in context: A030975 A144495 A154259 * A088128 A001053 A124552
Adjacent sequences: A066111 A066112 A066113 * A066115 A066116 A066117
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KEYWORD
| nonn,easy
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AUTHOR
| George E. Antoniou (george.antoniou(AT)montclair.edu), Dec 05 2001
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