1567298domain: NAppears in sequencesa(n) = floor(a(n-2)^2/a(n-1)) + a(n-1) + a(n-2), a(0) = 0, a(1) = 1, a(2) = 1, ...at n=25A096081Number of n X n symmetric 0..7 arrays with each element equal to at least two horizontal or vertical neighbors and with new values 0..7 introduced in lower triangular row major order.at n=7A193001