login
A236368
a(n) = 4^(n!) - 3^(n!).
1
1, 1, 7, 3367, 281192547174175, 1766847064778382532572997586311708102647654387270579226645978663441513375
OFFSET
0,3
COMMENTS
a(6) has 434 digits.
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
KEYWORD
nonn
AUTHOR
Assoul Abdelkarim, Jan 23 2014
STATUS
approved