a(n+1) = 1 + a( floor(n/1) ) + a( floor(n/2) ) + ... + a( floor(n/n) ).

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =12a(5) =18a(6) =28a(7) =39a(8) =55a(9) =74a(10) =100a(11) =127a(12) =167a(13) =208a(14) =261a(15) =322a(16) =399a(17) =477a(18) =581a(19) =686a(20) =820a(21) =967a(22) =1142a(23) =1318a(24) =1545a(25) =1778a(26) =2053a(27) =2347a(28) =2697a(29) =3048