Partial sums of A006567.

Terms

a(0) =13a(1) =30a(2) =61a(3) =98a(4) =169a(5) =242a(6) =321a(7) =418a(8) =525a(9) =638a(10) =787a(11) =944a(12) =1111a(13) =1290a(14) =1489a(15) =1800a(16) =2137a(17) =2484a(18) =2843a(19) =3232a(20) =3933a(21) =4642a(22) =5375a(23) =6114a(24) =6857a(25) =7608a(26) =8369a(27) =9138a(28) =10045a(29) =10982