492401domain: NAppears in sequencesNumber of n X 3 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 1 or 4 1s.at n=7A295270T(n,k)=Number of nXk 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 1 or 4 1s.at n=47A295275