Partial sums of A018805.

Terms

a(0) =1a(1) =4a(2) =11a(3) =22a(4) =41a(5) =64a(6) =99a(7) =142a(8) =197a(9) =260a(10) =343a(11) =434a(12) =549a(13) =676a(14) =819a(15) =978a(16) =1169a(17) =1372a(18) =1611a(19) =1866a(20) =2145a(21) =2444a(22) =2787a(23) =3146a(24) =3545a(25) =3968a(26) =4427a(27) =4910a(28) =5449a(29) =6004