280340domain: NAppears in sequencesa(n) = number of primes of the form x^2 + 1 <= 2^n.at n=44A083847Number of primes of the form x^2 + 1 < 2^n.at n=44A174246Number of n X 3 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 1 1 vertically.at n=14A207584