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A131491
2*prime(n)!.
0
4, 12, 240, 10080, 79833600, 12454041600, 711374856192000, 243290200817664000, 51704033477769953280000, 17683523987479403909087232000000, 16445677308355845635451125760000000, 27527506182452690092631959163161804800000000
OFFSET
1,1
FORMULA
a(n) = 2*A039716(n) = 2*A000142[A000040(n)]. - R. J. Mathar, Jul 31 2007
MATHEMATICA
2*Prime[Range[15]]! (* Harvey P. Dale, Dec 19 2011 *)
CROSSREFS
Sequence in context: A076030 A348789 A202859 * A286881 A366822 A360498
KEYWORD
easy,nonn
AUTHOR
Giovanni Teofilatto, Jul 29 2007
EXTENSIONS
More terms from Harvey P. Dale, Dec 19 2011
STATUS
approved