a(n) = A014284(n^2) + A014284(n^2-1).

Terms

a(0) =1a(1) =17a(2) =137a(3) =611a(4) =1839a(5) =4405a(6) =9101a(7) =16859a(8) =28987a(9) =46663a(10) =71797a(11) =105863a(12) =151259a(13) =209895a(14) =284777a(15) =378661a(16) =493863a(17) =634985a(18) =804801a(19) =1007439a(20) =1245345a(21) =1526369a(22) =1851971a(23) =2227153a(24) =2658287a(25) =3151447a(26) =3711837a(27) =4343483a(28) =5053859a(29) =5849959