5313025domain: NAppears in sequencesNumber of n X 6 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically.at n=20A207597Squares which can be represented as sum of a prime and its reverse in at least one way.at n=6A227525Squares of the form k + reverse(k) for at least one k.at n=24A358880