For n >= 2, a(n) = a(n-1) + a(n-2) + A051697(n), a(0)=0, a(1)=1.

Terms

a(0) =0a(1) =1a(2) =3a(3) =7a(4) =13a(5) =25a(6) =43a(7) =75a(8) =125a(9) =207a(10) =343a(11) =561a(12) =915a(13) =1489a(14) =2417a(15) =3919a(16) =6353a(17) =10289a(18) =16659a(19) =26967a(20) =43645a(21) =70631a(22) =114299a(23) =184953a(24) =299275a(25) =484251a(26) =783549a(27) =1267829a(28) =2051407a(29) =3319265