a(n) = 2*n*(6*n-1).

Terms

a(0) =0a(1) =10a(2) =44a(3) =102a(4) =184a(5) =290a(6) =420a(7) =574a(8) =752a(9) =954a(10) =1180a(11) =1430a(12) =1704a(13) =2002a(14) =2324a(15) =2670a(16) =3040a(17) =3434a(18) =3852a(19) =4294a(20) =4760a(21) =5250a(22) =5764a(23) =6302a(24) =6864a(25) =7450a(26) =8060a(27) =8694a(28) =9352a(29) =10034