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Search: id:A093987
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| A093987 |
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a(1) = 1, a(2) = 2, a(n+1) = a(n)^(2n)/ a(n-1). Symmetrically a(n) = {a(n-1)*a(n+1)}^[1/{(n-1) +(n+1)}]. |
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1
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| 1, 2, 16, 8388608, 1532495540865888858358347027150309183618739122183602176
(list; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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a(5) =8388608^8/16 = 1.53249554e+54.
a(6) =~ 8.5173068734e+534.
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MATHEMATICA
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a[1] = 1; a[2] = 2; a[n_] := a[n - 1]^(2n - 2)/a[n - 2]; Table[ a[n], {n, 6}] (from Robert G. Wilson v May 24 2004)
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CROSSREFS
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Cf. A093985, A093986.
Sequence in context: A061301 A092798 A068916 this_sequence A114560 A108883 A162623
Adjacent sequences: A093984 A093985 A093986 this_sequence A093988 A093989 A093990
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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), May 22 2004
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EXTENSIONS
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Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), May 24 2004
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