a(n) = n^2 + (n+1)^2 + (n+2)^2 + (n+3)^2.

Terms

a(0) =14a(1) =30a(2) =54a(3) =86a(4) =126a(5) =174a(6) =230a(7) =294a(8) =366a(9) =446a(10) =534a(11) =630a(12) =734a(13) =846a(14) =966a(15) =1094a(16) =1230a(17) =1374a(18) =1526a(19) =1686a(20) =1854a(21) =2030a(22) =2214a(23) =2406a(24) =2606a(25) =2814a(26) =3030a(27) =3254a(28) =3486a(29) =3726