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A241098 (4^n - 1)^n. 1
1, 3, 225, 250047, 4228250625, 1120413075641343, 4715453174592516890625, 316777275155162685106909462527, 340240830764391036687105719527812890625, 5845805845679338940092384222659294205213252255743, 1606922719369349023077959288770050490334792256259918212890625 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..10.

FORMULA

(4^n - 1)^n

EXAMPLE

a(3) = 63^3 = 250047.

PROG

(PARI) a(n) = (4^n - 1)^n; \\ Michel Marcus, Apr 16 2014

CROSSREFS

Cf. A055601, A060613, A241095, A240091.

Sequence in context: A157557 A279532 A157582 * A254157 A131493 A228871

Adjacent sequences:  A241095 A241096 A241097 * A241099 A241100 A241101

KEYWORD

nonn

AUTHOR

Hannah Ko, Apr 15 2014

STATUS

approved

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Last modified July 31 04:50 EDT 2021. Contains 346367 sequences. (Running on oeis4.)