Composite number of the form 4n^2+1.

Terms

a(0) =65a(1) =145a(2) =325a(3) =485a(4) =785a(5) =901a(6) =1025a(7) =1157a(8) =1445a(9) =1765a(10) =1937a(11) =2117a(12) =2305a(13) =2501a(14) =2705a(15) =3365a(16) =3601a(17) =3845a(18) =4097a(19) =4625a(20) =4901a(21) =5185a(22) =5777a(23) =6085a(24) =6401a(25) =6725a(26) =7397a(27) =7745a(28) =8465a(29) =9217