a(n) = 9*n^2 + n.

Terms

a(0) =10a(1) =38a(2) =84a(3) =148a(4) =230a(5) =330a(6) =448a(7) =584a(8) =738a(9) =910a(10) =1100a(11) =1308a(12) =1534a(13) =1778a(14) =2040a(15) =2320a(16) =2618a(17) =2934a(18) =3268a(19) =3620a(20) =3990a(21) =4378a(22) =4784a(23) =5208a(24) =5650a(25) =6110a(26) =6588a(27) =7084a(28) =7598a(29) =8130