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A139174
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Natural numbers of the form (n!-4)/4.
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9
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5, 29, 179, 1259, 10079, 90719, 907199, 9979199, 119750399, 1556755199, 21794572799, 326918591999, 5230697471999, 88921857023999, 1600593426431999, 30411275102207999, 608225502044159999
(list; graph; refs; listen; history; internal format)
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OFFSET
| 4,1
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 4..300
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FORMULA
| a(n)= numerator(((n+2)!-4)/(7*(n+2)!)), with offset 2 [From Gary Detlefs, Nov 07 2010]
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MATHEMATICA
| Table[(n! - 4)/4, {n, 4, 20}]
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PROG
| (MAGMA) [(Factorial(n)-4)/4: n in [4..25]]; // Vincenzo Librandi, Jul 20 2011
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CROSSREFS
| Cf. A033312, A139172, A139173, A139174, A139175, A139176, A139177, A139183, A139184.
Sequence in context: A160906 A163073 A190802 * A153296 A194723 A190917
Adjacent sequences: A139171 A139172 A139173 * A139175 A139176 A139177
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KEYWORD
| nonn,easy
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AUTHOR
| Artur Jasinski (grafix(AT)csl.pl), Apr 11 2008
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EXTENSIONS
| Definition corrected by Gary Detlefs, Nov 07 2010
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