a(0)=-1, a(1)=3; a(n+2) = a(n+1) + a(n) + 2*A057078(n+1).

Terms

a(0) =-1a(1) =3a(2) =2a(3) =3a(4) =7a(5) =10a(6) =15a(7) =27a(8) =42a(9) =67a(10) =111a(11) =178a(12) =287a(13) =467a(14) =754a(15) =1219a(16) =1975a(17) =3194a(18) =5167a(19) =8363a(20) =13530a(21) =21891a(22) =35423a(23) =57314a(24) =92735a(25) =150051a(26) =242786a(27) =392835a(28) =635623a(29) =1028458