OFFSET
1,2
LINKS
Harry J. Smith, Table of n, a(n) for n = 1..40
FORMULA
For n >= 1, a(n) = 4^(n^2) - A053291(n) = 4^(n^2) - (4^n - 1)*(4^n - 4)*...*(4^n - 4^(n-1)).
MAPLE
for n from 1 to 15 do printf(`%d, `, 4^(n^2) - product(4^n-4^j, j=0..n-1)) od:
PROG
(PARI) a(n)={4^(n^2) - prod(j=0, n - 1, 4^n - 4^j)} \\ Harry J. Smith, Jul 10 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Avi Peretz (njk(AT)netvision.net.il), Apr 21 2001
EXTENSIONS
More terms from James A. Sellers, Apr 24 2001
STATUS
approved