49818domain: NAppears in sequencesa(n) = 3^n + 7^n + 8^n.at n=5A074558Number of n-digit primes of the form (k-1)^2 + k^2.at n=11A218207Number of 0..n arrays of length 5 with each element differing from at least one neighbor by 1 or less.at n=30A221597