Partial sums of A033485.

Terms

a(0) =1a(1) =3a(2) =6a(3) =11a(4) =18a(5) =28a(6) =41a(7) =59a(8) =82a(9) =112a(10) =149a(11) =196a(12) =253a(13) =323a(14) =406a(15) =507a(16) =626a(17) =768a(18) =933a(19) =1128a(20) =1353a(21) =1615a(22) =1914a(23) =2260a(24) =2653a(25) =3103a(26) =3610a(27) =4187a(28) =4834a(29) =5564