A Somos 9-type recurrence: a(n) = (3*a(n-1)*a(n-8) - a(n-4)*a(n-5))/a(n-9), with a(0)=...=a(8)=1.

A122055

A Somos 9-type recurrence: a(n) = (3*a(n-1)*a(n-8) - a(n-4)*a(n-5))/a(n-9), with a(0)=...=a(8)=1.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =2a(10) =5a(11) =14a(12) =41a(13) =121a(14) =353a(15) =989a(16) =2393a(17) =9397a(18) =49121a(19) =342793a(20) =2842633a(21) =24619238a(22) =211654405a(23) =1731275594a(24) =11581792513a(25) =107195509553

External references