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Search: id:A081955
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| A081955 |
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a(n) = 2^r*3^s where r = n(n+1)/2 and s = n(n-1)/2. |
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+0
4
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| 2, 24, 1728, 746496, 1934917632, 30091839012864, 2807929681968365568, 1572081206902992767287296, 5280985496827154199640037916672, 106440332834866049138191223105387495424
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OFFSET
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1,1
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FORMULA
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a(n+1) = 2^(n+1)*3^n*a(n), a(1) = 2. - Ryan Propper (rpropper(AT)stanford.edu), Jun 15 2005
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MATHEMATICA
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Do[Print[2^(n*(n+1)/2)*3^(n*(n-1)/2)], {n, 10}] (Propper)
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CROSSREFS
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Sequence contains the product of a row in A081954.
Cf. A025192, A081954, A081956.
Sequence in context: A028365 A000479 A111427 this_sequence A163086 A053995 A007079
Adjacent sequences: A081952 A081953 A081954 this_sequence A081956 A081957 A081958
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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), Apr 02 2003
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EXTENSIONS
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More terms from Ryan Propper (rpropper(AT)stanford.edu), Jun 15 2005
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