21688182domain: NAppears in sequencesNumber of 3 X n matrices with 3*n/2 1's (if n is even) or (3*n+1)/2 1's (if n is odd) that do not have a horizontal nor vertical nor diagonal 3-streak of 1's.at n=34A339631Number of final Tic-Tac-Toe positions on a (2*n) X 3 board that resulted in a tie.at n=17A339633