a(n) = a([ n/2 ]) + a([ n/3 ]) + . . . + a([ n/n ]) for n > 1, a(1) = 1.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =4a(5) =6a(6) =7a(7) =9a(8) =11a(9) =13a(10) =14a(11) =19a(12) =20a(13) =22a(14) =25a(15) =29a(16) =30a(17) =36a(18) =37a(19) =42a(20) =45a(21) =47a(22) =48a(23) =60a(24) =62a(25) =64a(26) =68a(27) =73a(28) =74a(29) =84