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Search: id:A118708
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| A118708 |
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Triangular array made from A002110 primorial numbers of the first kind. |
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1
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| 1, 1, -2, 1, -8, 12, 1, -38, 252, -360, 1, -248, 8232, -53280, 75600, 1, -2558, 581112, -19069200, 123152400, -174636000, 1, -32588, 77397852, -17469862560, 572771228400, -3698441208000, 5244319080000, 1, -543098, 16713897732, -39529847287080, 8919112306734000
(list; table; graph; listen)
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OFFSET
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0,3
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COMMENT
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The primorial of the second kind A034386 is more Stirling like as the row sum of this sequence isn't zero.
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FORMULA
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a(n,n) = coefficients[a[n,m]*x^n]
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EXAMPLE
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1
1, -2
1,-8, 12
1, -38, 252, -360
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MATHEMATICA
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p[1] = 2; p[n_Integer?Positive] := p[n] = Prime[n]*p[n - 1] a = Join[{{1}}, Table[Reverse[ CoefficientList[Product[x - p[n], {n, 0, m}], x]], {m, 0, 10}]] aout = Flatten[a]
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CROSSREFS
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Cf. A002110, A034386.
Sequence in context: A075513 A011019 A007026 this_sequence A055134 A137370 A102735
Adjacent sequences: A118705 A118706 A118707 this_sequence A118709 A118710 A118711
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KEYWORD
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sign,tabl,uned
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), May 20 2006
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