Squares of Pell numbers.

Terms

a(0) =0a(1) =1a(2) =4a(3) =25a(4) =144a(5) =841a(6) =4900a(7) =28561a(8) =166464a(9) =970225a(10) =5654884a(11) =32959081a(12) =192099600a(13) =1119638521a(14) =6525731524a(15) =38034750625a(16) =221682772224