Positive integer values of k such that 10*k^2 - 9 is a square.

Terms

a(0) =1a(1) =3a(2) =13a(3) =25a(4) =111a(5) =493a(6) =949a(7) =4215a(8) =18721a(9) =36037a(10) =160059a(11) =710905a(12) =1368457a(13) =6078027a(14) =26995669a(15) =51965329a(16) =230804967a(17) =1025124517a(18) =1973314045a(19) =8764510719a(20) =38927735977a(21) =74933968381a(22) =332820602355