A220079 7^(n!).

7, 7, 49, 117649, 191581231380566414401

Offset

0,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..6

Formula

a(n) = a(n - 1)^n, a(0) = 2.

a(n) = A000420(A000142(n)).

Mathematica

Table[7^(n!), {n, 0, 7}]

Prog

(Magma) [7^Factorial(n): n in [0..7]];
(Maxima) makelist(7^(n!), n, 0, 5); /* Martin Ettl, Dec 27 2012 */

Crossrefs

Cf. A000142, A000420, A050923, A100731, A220078.

Sequence in context: A214887 A203066 A165425 * A153272 A117860 A367456

Adjacent sequences: A220076 A220077 A220078 * A220080 A220081 A220082

Keyword

nonn

Author

Vincenzo Librandi, Dec 16 2012

Status

approved