210066388900domain: NAppears in sequencesa(0) = 0; for n > 0, a(n) = (a(n-1) + 1)^2.at n=6A004019Start with 1; square; add 2; subtract 1; repeat.at n=16A059417Square array read by antidiagonals with T(n,k)=T(n,k-1)^2+n*T(n,k-1)+1 and T(n,0)=0.at n=38A060136