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A111686
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(n+1) + (n+1)(n+2) + ..., with n terms.
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2
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2, 15, 144, 1925, 33648, 726327, 18636560, 553680369, 18684924840, 705833193923, 29502690532392, 1351724235304365, 67359683340291104, 3627011494019437935, 209846445862386234528, 12982402818188717219657, 855210841645834409812920
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OFFSET
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1,1
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LINKS
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EXAMPLE
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a(3) = 4+ 4*5 +4*5*6 = 144.
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MAPLE
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a:=n->sum((n+j)!, j=1..n)/n!: seq(a(n), n=1..18); # Emeric Deutsch, Aug 27 2005
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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