-6362domain: ZAppears in sequencesSmallest term in wrecker ball sequence starting with n.at n=7A248952Signed recurrence over strict trees: a(n) = -1 + Sum_{y1 + ... + yk = n, y1 > ... > yk > 0, k > 1} a(y1) * ... * a(yk).at n=24A300864