a(n) = (4*n+3)*(4*n+2).

Terms

a(0) =6a(1) =42a(2) =110a(3) =210a(4) =342a(5) =506a(6) =702a(7) =930a(8) =1190a(9) =1482a(10) =1806a(11) =2162a(12) =2550a(13) =2970a(14) =3422a(15) =3906a(16) =4422a(17) =4970a(18) =5550a(19) =6162a(20) =6806a(21) =7482a(22) =8190a(23) =8930a(24) =9702a(25) =10506a(26) =11342a(27) =12210a(28) =13110a(29) =14042