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Search: id:A091776
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| A091776 |
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a(1)= 1, a(n+1) = a(n)*{a(n)+1)}*{a(n)+2)*...*{a(n)+n-1)}/n. |
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+0
3
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| 1, 1, 1, 2, 30, 6678144, 14783742920460482277828601638764478251520
(list; graph; listen)
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OFFSET
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1,4
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COMMENT
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The next term, a(8), has 281 digits. - T. D. Noe (noe(AT)sspectra.com), Oct 25 2004
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EXAMPLE
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a(2)=1/1=1, a(3)=1*2/2=1, a(4)=1*2*3/3=2, a(5)=2*3*4*5/4=30.
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MATHEMATICA
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a[1]=1; a[n_] := Times@@Range[a[n-1], a[n-1]+n-2]/(n-1); Table[a[i], {i, 7}]
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CROSSREFS
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Cf. A091777.
Sequence in context: A090600 A113511 A062008 this_sequence A069460 A117816 A099189
Adjacent sequences: A091773 A091774 A091775 this_sequence A091777 A091778 A091779
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 16 2004
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EXTENSIONS
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Corrected and extended by T. D. Noe (noe(AT)sspectra.com), Oct 25 2004
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