a(n) = 144*n^2 - 127*n + 28.

Terms

a(0) =45a(1) =350a(2) =943a(3) =1824a(4) =2993a(5) =4450a(6) =6195a(7) =8228a(8) =10549a(9) =13158a(10) =16055a(11) =19240a(12) =22713a(13) =26474a(14) =30523a(15) =34860a(16) =39485a(17) =44398a(18) =49599a(19) =55088a(20) =60865a(21) =66930a(22) =73283a(23) =79924a(24) =86853a(25) =94070a(26) =101575a(27) =109368a(28) =117449a(29) =125818