Beach-Williams Pell numbers of type k^2 + 4.

Terms

a(0) =2605a(1) =8653a(2) =11029a(3) =17693a(4) =21029a(5) =22205a(6) =22805a(7) =25285a(8) =27229a(9) =30629a(10) =39605a(11) =40405a(12) =42029a(13) =45373a(14) =50629a(15) =56173a(16) =62005a(17) =63005a(18) =74533a(19) =83525