79130domain: NAppears in sequencesExpansion of (1 - 2*x^2)/(1 + x)^5. Fourth column of Riordan triangle A248156.at n=39A248160Number of n X 3 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,0) or (-1,1) and new values introduced in order 0..2.at n=13A275178