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A135292 a(n) = 5^n * 4^(n^2). 2
1, 20, 6400, 32768000, 2684354560000, 3518437208883200000, 73786976294838206464000000, 24758800785707605497982484480000000, 132922799578491587290380706028034457600000000 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
Hankel transform of A130976 .
LINKS
FORMULA
a(n)=5^n*4^(n^2)=A000351(n)*A060757(n).
MATHEMATICA
Table[5^n*4^(n^2), {n, 0, 10}] (* G. C. Greubel, Oct 09 2016 *)
PROG
(PARI) a(n)=5^n*4^(n^2) \\ Charles R Greathouse IV, Oct 09 2016
CROSSREFS
Sequence in context: A088852 A123379 A175015 * A222721 A223051 A222744
KEYWORD
nonn,easy
AUTHOR
Philippe Deléham, Dec 04 2007
STATUS
approved

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Last modified July 21 00:40 EDT 2024. Contains 374462 sequences. (Running on oeis4.)