a(n) = 5*a(n-2) + 2*a(n-3).

Terms

a(0) =0a(1) =0a(2) =1a(3) =0a(4) =5a(5) =2a(6) =25a(7) =20a(8) =129a(9) =150a(10) =685a(11) =1008a(12) =3725a(13) =6410a(14) =20641a(15) =39500a(16) =116025a(17) =238782a(18) =659125a(19) =1425960a(20) =3773189a(21) =8448050a(22) =21717865a(23) =49786628a(24) =125485425a(25) =292368870a(26) =727000381a(27) =1712815200a(28) =4219739645a(29) =10018076762