Number of finite positive integer sequences b(1),...,b(k), with k <= n and b(1)*b(2)*...*b(k) <= n.

Terms

a(0) =1a(1) =5a(2) =15a(3) =44a(4) =85a(5) =216a(6) =343a(7) =806a(8) =1299a(9) =2155a(10) =2926a(11) =7162a(12) =9477a(13) =13209a(14) =17935a(15) =37824a(16) =47957a(17) =75600a(18) =93613a(19) =138074a(20) =170730a(21) =209000a(22) =249481a(23) =635974a(24) =764425a(25) =915551a(26) =1109772a(27) =1390375a(28) =1624029a(29) =2103690