87199domain: NAppears in sequencesNumbers n such that 30n-13, 30n-11, 30n-1, 30n+1, 30n+11, 30n+13 are all prime.at n=28A175683Numbers k such that (13*10^k + 197)/3 is prime.at n=28A276311Number of n X n 0..1 arrays with every element equal to 1, 2 or 4 king-move adjacent elements, with upper left element zero.at n=18A297851