168765domain: NAppears in sequencesSum of all terms on the two principal diagonals of a 2n+1 X 2n+1 square spiral.at n=31A114254Numbers k for which 2*k+7, 4*k+7, 6*k+7, 8*k+7, 10*k+7 and 12*k+7 are primes.at n=19A210505