a(n) = floor(b(n)), where b(1) = 1 and b(n) = b(n-1) + Sum_{k=1..n-1} b(k)/(n-1).

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =8a(5) =12a(6) =18a(7) =25a(8) =35a(9) =48a(10) =64a(11) =85a(12) =111a(13) =143a(14) =184a(15) =234a(16) =296a(17) =371a(18) =463a(19) =575a(20) =709a(21) =872a(22) =1066a(23) =1298a(24) =1575a(25) =1903a(26) =2293a(27) =2752a(28) =3294a(29) =3931