Partial sums of A174928.

Terms

a(0) =1a(1) =66a(2) =132a(3) =262a(4) =393a(5) =588a(6) =784a(7) =1044a(8) =1305a(9) =1630a(10) =1956a(11) =2346a(12) =2737a(13) =3192a(14) =3648a(15) =4168a(16) =4689a(17) =5274a(18) =5860a(19) =6510a(20) =7161a(21) =7876a(22) =8592a(23) =9372a(24) =10153a(25) =10998a(26) =11844a(27) =12754a(28) =13665a(29) =14640