a(n) = Sum_{i=1..n} A005235(i).

Terms

a(0) =3a(1) =8a(2) =15a(3) =28a(4) =51a(5) =68a(6) =87a(7) =110a(8) =147a(9) =208a(10) =275a(11) =336a(12) =407a(13) =454a(14) =561a(15) =620a(16) =681a(17) =790a(18) =879a(19) =982a(20) =1061a(21) =1212a(22) =1409a(23) =1510a(24) =1613a(25) =1846a(26) =2069a(27) =2196a(28) =2419a(29) =2610