a(n) is the number of possible values of numbers of divisors of numbers k with Omega(k) = n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =7a(6) =11a(7) =15a(8) =21a(9) =29a(10) =39a(11) =49a(12) =66a(13) =84a(14) =108a(15) =136a(16) =171a(17) =211a(18) =259a(19) =320a(20) =386a(21) =468a(22) =565a(23) =674a(24) =801a(25) =954a(26) =1117a(27) =1333a(28) =1556a(29) =1831