a(n) = 3*n*(64*n^2 + 1).

Terms

a(0) =195a(1) =1542a(2) =5193a(3) =12300a(4) =24015a(5) =41490a(6) =65877a(7) =98328a(8) =139995a(9) =192030a(10) =255585a(11) =331812a(12) =421863a(13) =526890a(14) =648045a(15) =786480a(16) =943347a(17) =1119798a(18) =1316985a(19) =1536060a(20) =1778175a(21) =2044482a(22) =2336133a(23) =2654280a(24) =3000075a(25) =3374670a(26) =3779217a(27) =4214868a(28) =4682775a(29) =5184090