A276274 a(n) = (2*n+1)^(2*(2*n+1)^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

Adjacent sequences: A276271 A276272 A276273 * A276275 A276276 A276277

Keyword

nonn

Author

Christopher C. Capobianco, Aug 26 2016

Status

approved