Bisection of Lucas sequence: a(n) = L(2*n+1).

Terms

a(0) =1a(1) =4a(2) =11a(3) =29a(4) =76a(5) =199a(6) =521a(7) =1364a(8) =3571a(9) =9349a(10) =24476a(11) =64079a(12) =167761a(13) =439204a(14) =1149851a(15) =3010349a(16) =7881196a(17) =20633239a(18) =54018521a(19) =141422324a(20) =370248451a(21) =969323029a(22) =2537720636a(23) =6643838879a(24) =17393796001a(25) =45537549124a(26) =119218851371a(27) =312119004989a(28) =817138163596