173351domain: NAppears in sequencesa(n) = 23 + floor( 1 + Sum_{j=1..n-1} a(j)/2 ).at n=22A120147Number of nX7 0..1 arrays with every element unequal to 0, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero.at n=11A305046