73738domain: NAppears in sequencesNumber of lower triangles of a 4 X 4 0..n array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by one or less.at n=32A195234a(n) = 18*2^n + 10.at n=12A305060Smallest k such that 5^(5^n) - k is prime.at n=6A364453