a(0) = 1, and for n >= 0, a(n+1) = -A326936(a(n)).

Terms

a(0) =1a(1) =3a(2) =7a(3) =18a(4) =35a(5) =84a(6) =222a(7) =459a(8) =1186a(9) =2099a(10) =4731a(11) =8093a(12) =19674a(13) =49289a(14) =102408a(15) =242522a(16) =659653