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A065961
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((3*n-1)!*n)/2.
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2
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1, 120, 60480, 79833600, 217945728000, 1067062284288000, 8515157028618240000, 103408066955539906560000, 1814811575069725360128000000, 44208809968698509772718080000000, 1447219603135314415919699066880000000, 61998887798316869577999908025139200000000
(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,...,60
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FORMULA
| a(n) = (3*n)! / 6.
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PROG
| (PARI) { for (n=1, 60, a=(3*n - 1)!*n/2; write("b065961.txt", n, " ", a) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Nov 04 2009]
(MAGMA) [ Factorial(3*n)/6: n in [1..62] ]; // Vincenzo Librandi, Apr 24 2011
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CROSSREFS
| Sequence in context: A006176 A109897 A074653 * A058528 A001421 A107446
Adjacent sequences: A065958 A065959 A065960 * A065962 A065963 A065964
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KEYWORD
| nonn
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AUTHOR
| Len Smiley (smiley(AT)math.uaa.alaska.edu) and George E. Antoniou (george.antoniou(AT)montclair.edu), Dec 08 2001
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