274878955521
domain: N
Appears in sequences
- a(n) = (2^n + 1)^2.at n=19A028400
- Product of divisors of 2^n + 1.at n=18A069060
- (2^p+1)^2 where p is prime.at n=7A174623
- Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 0 1 1 vertically.at n=17A208556
- a(n) = 9*J(n)^2 where J(n) are the Jacobsthal numbers A001045 with J(0) = 1.at n=19A323210