59191domain: NAppears in sequencesa(n) = (n+1)*(n+2)*(n+3)*(13*n^3 + 69*n^2 + 113*n + 60)/360.at n=9A108649The Matula number of the rooted tree obtained from the rooted tree T having Matula number n by replacing each edge of T with a path of length 2.at n=32A257538p-INVERT of the positive squares, where p(S) = 1 - S^2.at n=9A292479