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A236368 4^n! - 3^n!. 1
1, 1, 7, 3367, 281192547174175, 1766847064778382532572997586311708102647654387270579226645978663441513375 (list; graph; refs; listen; history; text; internal format)
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.

Sequence in context: A070227 A218141 A172956 * A055307 A052496 A216935

Adjacent sequences:  A236365 A236366 A236367 * A236369 A236370 A236371

KEYWORD

nonn

AUTHOR

Assoul Abdelkarim, Jan 23 2014

STATUS

approved

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Last modified August 7 17:44 EDT 2020. Contains 336278 sequences. (Running on oeis4.)