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Search: id:A084949
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| A084949 |
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Product(9*i+2,i=0..n-1). |
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+0
11
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| 1, 2, 22, 440, 12760, 484880, 22789360, 1276204160, 82953270400, 6138542009600, 509498986796800, 46873906785305600, 4734264585315865600, 520769104384745216000, 61971523421784680704000
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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A084949(n) = A084944(n)/A000142(n)*A000079(n) = 9^n*pochhammer(2/9, n) = 9^n*GAMMA(n+2/9)/GAMMA(2/9)
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MAPLE
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a := n->product(9*i+2, i=0..n-1); [seq(a(j), j=0..30)];
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MATHEMATICA
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s=1; lst={s}; Do[s+=n*s; AppendTo[lst, s], {n, 1, 2*5!, 9}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 08 2008]
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CROSSREFS
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Cf. A000165, A008544, A001813, A047055, A047657, A084947, A084948.
Cf. A035012.
Sequence in context: A007842 A013519 A163436 this_sequence A137076 A090730 A090313
Adjacent sequences: A084946 A084947 A084948 this_sequence A084950 A084951 A084952
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KEYWORD
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easy,nonn
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AUTHOR
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Daniel Dockery (peritus(AT)gmail.com) Jun 13 2003
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