279744domain: NAppears in sequencesNumber of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001111.at n=11A260365Growth series for group with presentation < S, T : S^2 = T^3 = (S*T)^12 = 1 >.at n=35A299253