115954domain: NAppears in sequencesG.f.: (1+x)^2/[(1-x)^4(1-x-x^2)^3].at n=10A001926Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 3 X 3 plus 2,1 2,2 2,3 1,2 3,2.at n=16A145999