90524domain: NAppears in sequencesNumber of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock summing to 6.at n=4A183633Number of (n+1) X 6 0..3 arrays with every 2 X 2 subblock summing to 6.at n=4A183638Numbers k such that k and k+1 both have the prime signature (2,1,1,1) (A189982).at n=33A336658