a(n) = 2*n*(4*n + 1).

Terms

a(0) =0a(1) =10a(2) =36a(3) =78a(4) =136a(5) =210a(6) =300a(7) =406a(8) =528a(9) =666a(10) =820a(11) =990a(12) =1176a(13) =1378a(14) =1596a(15) =1830a(16) =2080a(17) =2346a(18) =2628a(19) =2926a(20) =3240a(21) =3570a(22) =3916a(23) =4278a(24) =4656a(25) =5050a(26) =5460a(27) =5886a(28) =6328a(29) =6786