a(n) = 36*n^2 + 2*n.

Terms

a(0) =38a(1) =148a(2) =330a(3) =584a(4) =910a(5) =1308a(6) =1778a(7) =2320a(8) =2934a(9) =3620a(10) =4378a(11) =5208a(12) =6110a(13) =7084a(14) =8130a(15) =9248a(16) =10438a(17) =11700a(18) =13034a(19) =14440a(20) =15918a(21) =17468a(22) =19090a(23) =20784a(24) =22550a(25) =24388a(26) =26298a(27) =28280a(28) =30334a(29) =32460