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%I #14 Jan 29 2019 09:28:06
%S 1,5,15,44,85,216,343,806,1299,2155,2926,7162,9477,13209,17935,37824,
%T 47957,75600,93613,138074,170730,209000,249481,635974,764425,915551,
%U 1109772,1390375,1624029,2103690,2430431,5120488,5976553,6946897
%N Number of finite positive integer sequences b(1),...,b(k), with k <= n and b(1)*b(2)*...*b(k) <= n.
%C The subsequence of primes begins 5, then no more through a(34). What is the next prime? - _Jonathan Vos Post_, Jan 07 2011
%H Charlie Neder, <a href="/A064453/b064453.txt">Table of n, a(n) for n = 1..1000</a>
%e Sequences b for n = 2 are {1}, {2}, {1, 1}, {2, 1}, {1, 2}, so a(2)=5.
%K nice,nonn
%O 1,2
%A Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Oct 02 2001
%E a(21)-a(34) from _Donovan Johnson_, Sep 06 2010
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