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1, 7, 39, 239, 1679, 13439, 120959, 1209599, 13305599, 159667199, 2075673599, 29059430399, 435891455999, 6974263295999, 118562476031999, 2134124568575999, 40548366802943999, 810967336058879999
(list; graph; refs; listen; history; internal format)
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OFFSET
| 3,2
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COMMENTS
| Original definition: Natural numbers of the form (n!-3)/3.
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 3..300
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MATHEMATICA
| Table[(n! - 3)/3, {n, 3, 20}]
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PROG
| (MAGMA) [Factorial(n)/3 -1: n in [3..25]]; // Vincenzo Librandi, Jul 20 2011
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CROSSREFS
| Cf. A033312, A139172, A139173, A139174, A139175, A139176, A139177, A139183, A139184.
Cf. A139191: primes in this sequence. [From M. F. Hasler, Apr 09 2009]
Sequence in context: A155589 A071082 A122884 * A138417 A207154 A203111
Adjacent sequences: A139170 A139171 A139172 * A139174 A139175 A139176
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KEYWORD
| nonn
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AUTHOR
| Artur Jasinski (grafix(AT)csl.pl), Apr 11 2008
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EXTENSIONS
| Edited by M. F. Hasler (www.univ-ag.fr/~mhasler), Apr 09 2009
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