81992domain: NAppears in sequencesNumber of binary strings of length n with no substrings equal to 0011 0110 or 1001.at n=17A164506Number of n X 2 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 3 binary array having an odd sum, with rows and columns of the latter in lexicographically nondecreasing order.at n=16A227675