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Search: id:A109664
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| A109664 |
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a(1) = 1; for n>1, a(n) = Sum_{i=1..n-1} a(i)*prime(i). |
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+0
1
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| 1, 2, 8, 48, 384, 4608, 64512, 1161216, 23224320, 557383680, 16721510400, 535088332800, 20333356646400, 854000979148800, 37576043082547200, 1803650067962265600, 97397103669962342400, 5843826220197740544000
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OFFSET
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1,2
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MATHEMATICA
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a[n_] := 1 /; n == 1 a[n_] := Sum[a[i]*Prime[i], {i, 1, n-1}] Table[a[i], {i, 1, 12}]
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CROSSREFS
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Sequence in context: A095989 A124453 A000165 this_sequence A009812 A063075 A112541
Adjacent sequences: A109661 A109662 A109663 this_sequence A109665 A109666 A109667
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KEYWORD
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easy,nonn
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AUTHOR
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Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Aug 06 2005
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 09 2005
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