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Search: id:A089836
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| 2, 28, 704, 26800, 1404416, 94890112, 7887853568, 779773444864, 89407927009280, 11666949886007296, 1707352344419336192, 276938622991133237248, 49316570352062326636544, 9565558797749164794511360
(list; graph; listen)
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OFFSET
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1,1
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MAPLE
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INVERT(A089835); INVERT([seq(A000108(n)*A000108(n)*(n+1)!, n=1..9)]);
a:= proc(n) option remember; local i; `if` (n<1, 1, add (a(n-i) *(2*i)!^2 /i!^3 /(i+1), i=1..n)) end: seq (a(n), n=1..15); [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Apr 01 2009]
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CROSSREFS
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Sequence in context: A143585 A151332 A098631 this_sequence A090249 A009256 A012725
Adjacent sequences: A089833 A089834 A089835 this_sequence A089837 A089838 A089839
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KEYWORD
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nonn
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AUTHOR
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Antti Karttunen (His_Firstname.His_Surname(AT)iki.fi), Dec 05 2003
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EXTENSIONS
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More terms from Alois P. Heinz (heinz(AT)hs-heilbronn.de), Apr 01 2009
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