335953domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of (2+2) X (n+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 1, 2, 4, 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 1, 2, 4, 6 or 7.at n=8A252560Primes of the form (2^a+1)*(3^b+1)-1 with a, b >= 0.at n=36A349638Prime numbersat n=28871