a(n) = 7*a(n-1)-6*a(n-3)+a(n-5).

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =3a(5) =15a(6) =94a(7) =641a(8) =4399a(9) =30232a(10) =207793a(11) =1428251a(12) =9817006a(13) =67476683a(14) =463797507a(15) =3187888306a(16) =21911786295a(17) =150609536029