Partial sums of A130237.

Terms

a(0) =0a(1) =2a(2) =8a(3) =20a(4) =36a(5) =61a(6) =91a(7) =126a(8) =174a(9) =228a(10) =288a(11) =354a(12) =426a(13) =517a(14) =615a(15) =720a(16) =832a(17) =951a(18) =1077a(19) =1210a(20) =1350a(21) =1518a(22) =1694a(23) =1878a(24) =2070a(25) =2270a(26) =2478a(27) =2694a(28) =2918a(29) =3150