a(n) = 2*A079291(n) (twice squares of Pell numbers).

Terms

a(0) =0a(1) =2a(2) =8a(3) =50a(4) =288a(5) =1682a(6) =9800a(7) =57122a(8) =332928a(9) =1940450a(10) =11309768a(11) =65918162a(12) =384199200a(13) =2239277042a(14) =13051463048a(15) =76069501250a(16) =443365544448