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A276274
a(n) = (2*n+1)^(2*(2*n+1)^2).
2
1, 387420489, 88817841970012523233890533447265625, 66009724686219550843768321818371771650147004059278069406814190436565131829325062449
OFFSET
0,2
COMMENTS
All terms are odd squares and are of the form k^k, where k = (2n+1)^2.
LINKS
Christopher C. Capobianco, Table of n, a(n) for n = 0..20
EXAMPLE
For n = 1, k = 3^2 = 9 and so a(1) = 3^(2*3^2) = 3^18 = 387420489.
MAPLE
A276274:=n->(2*n+1)^(2*(2*n+1)^2): seq(A276274(n), n=0..4); # Wesley Ivan Hurt, Sep 29 2016
MATHEMATICA
Table[{x, (2x+1)^(2(2x+1)^2), {x, 0, 20}]
PROG
(PARI) a(n)=my(k=(2*n+1)^2); k^k \\ Charles R Greathouse IV, Aug 30 2016
CROSSREFS
Subsequence of A000312, containing only the odd squares.
Intersection of A000312 and A016754.
Sequence in context: A017505 A017637 A319358 * A058125 A175280 A271022
KEYWORD
nonn
AUTHOR
STATUS
approved