108229domain: NAppears in sequencesa(n) = Sum_t t*F(n,t), where F(n,t) (see A095133) is the number of forests with n (unlabeled) nodes and exactly t trees.at n=15A005196Numerators of average numbers of trees in a forest on n nodes.at n=15A095131Products (semiprimes) of two distinct double-safe primes.at n=34A157356