a(1)=a(2)=1, a(3)=2; for n>3, a(n) = (a(n-1) + a(n-2))*a(n-3) - a(n-1).

A263045

a(1)=a(2)=1, a(3)=2; for n>3, a(n) = (a(n-1) + a(n-2))*a(n-3) - a(n-1).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =1a(4) =2a(5) =4a(6) =2a(7) =10a(8) =38a(9) =58a(10) =902a(11) =35578a(12) =2080262a(13) =1906407418

External references