Pisot sequence E(10,21), a(n) = floor( a(n-1)^2/a(n-2)+1/2 ).

Terms

a(0) =10a(1) =21a(2) =44a(3) =92a(4) =192a(5) =401a(6) =838a(7) =1751a(8) =3659a(9) =7646a(10) =15977a(11) =33385a(12) =69760a(13) =145768a(14) =304592a(15) =636465a(16) =1329935a(17) =2778986a(18) =5806873a(19) =12133841a(20) =25354455a(21) =52979793a(22) =110704745a(23) =231324810a(24) =483368330a(25) =1010029761a(26) =2110523290a(27) =4410076544a(28) =9215143569a(29) =19255645599