Row sums of A168281.

Terms

a(0) =2a(1) =4a(2) =12a(3) =20a(4) =38a(5) =56a(6) =88a(7) =120a(8) =170a(9) =220a(10) =292a(11) =364a(12) =462a(13) =560a(14) =688a(15) =816a(16) =978a(17) =1140a(18) =1340a(19) =1540a(20) =1782a(21) =2024a(22) =2312a(23) =2600a(24) =2938a(25) =3276a(26) =3668a(27) =4060a(28) =4510a(29) =4960