Partial sums of A120405.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =6a(5) =8a(6) =11a(7) =19a(8) =20a(9) =22a(10) =25a(11) =33a(12) =38a(13) =50a(14) =71a(15) =135a(16) =136a(17) =138a(18) =141a(19) =149a(20) =154a(21) =166a(22) =187a(23) =251a(24) =260a(25) =280a(26) =313a(27) =409a(28) =474a(29) =642