A236368 a(n) = 4^(n!) - 3^(n!).

1, 1, 7, 3367, 281192547174175, 1766847064778382532572997586311708102647654387270579226645978663441513375

Offset

0,3

Comments

a(6) has 434 digits.

Links

Table of n, a(n) for n=0..5.

Formula

a(n) = 4^(n!) - 3^(n!) = A101407(n) - A100731(n).

Example

a(3) = 4^(3!) - 3^(3!) = 4^6 - 3^6 = 3367.

Mathematica

4^#-3^#&/@(Range[0, 5]!) (* Harvey P. Dale, Nov 26 2016 *)

Prog

(PARI) a(n) = 4^(n!) - 3^(n!); \\ Michel Marcus, Jan 23 2014

Crossrefs

Cf. A175985, A203925.

Cf. A100731, A101407.

Sequence in context: A070227 A218141 A172956 * A350018 A055307 A052496

Adjacent sequences: A236365 A236366 A236367 * A236369 A236370 A236371

Keyword

nonn

Author

Assoul Abdelkarim, Jan 23 2014

Status

approved