Partial sums of A118371.

Terms

a(0) =2a(1) =5a(2) =10a(3) =17a(4) =30a(5) =49a(6) =72a(7) =103a(8) =140a(9) =183a(10) =230a(11) =283a(12) =344a(13) =423a(14) =506a(15) =607a(16) =714a(17) =823a(18) =936a(19) =1067a(20) =1206a(21) =1363a(22) =1530a(23) =1729a(24) =1940a(25) =2191a(26) =2460a(27) =2741a(28) =3024a(29) =3317