a(n) = n*(5*n-3).

Terms

a(0) =0a(1) =2a(2) =14a(3) =36a(4) =68a(5) =110a(6) =162a(7) =224a(8) =296a(9) =378a(10) =470a(11) =572a(12) =684a(13) =806a(14) =938a(15) =1080a(16) =1232a(17) =1394a(18) =1566a(19) =1748a(20) =1940a(21) =2142a(22) =2354a(23) =2576a(24) =2808a(25) =3050a(26) =3302a(27) =3564a(28) =3836a(29) =4118