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A135292
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a(n) = 5^n * 4^(n^2).
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2
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1, 20, 6400, 32768000, 2684354560000, 3518437208883200000, 73786976294838206464000000, 24758800785707605497982484480000000, 132922799578491587290380706028034457600000000
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OFFSET
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0,2
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COMMENTS
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Hankel transform of A130976 .
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LINKS
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G. C. Greubel, Table of n, a(n) for n = 0..40
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FORMULA
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a(n)=5^n*4^(n^2)=A000351(n)*A060757(n).
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MATHEMATICA
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Table[5^n*4^(n^2), {n, 0, 10}] (* G. C. Greubel, Oct 09 2016 *)
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PROG
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(PARI) a(n)=5^n*4^(n^2) \\ Charles R Greathouse IV, Oct 09 2016
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CROSSREFS
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Sequence in context: A088852 A123379 A175015 * A222721 A223051 A222744
Adjacent sequences: A135289 A135290 A135291 * A135293 A135294 A135295
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KEYWORD
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nonn,easy
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AUTHOR
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Philippe Deléham, Dec 04 2007
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STATUS
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approved
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