A220079 a(n) = 7^(n!).

7, 7, 49, 117649, 191581231380566414401

Offset: 0

Author

Vincenzo Librandi, Dec 16 2012

Keywords

• nonn

Links

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

Crossrefs

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

Programs

Magma

[7^Factorial(n): n in [0..7]];

Mathematica

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

Maxima

makelist(7^(n!),n,0,5); /* Martin Ettl, Dec 27 2012 */

Formula

a(n) = a(n-1)^n, a(0) = 7.

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