Alternately add and multiply the last two terms starting with 2, 1.

A391887

Alternately add and multiply the last two terms starting with 2, 1.

Terms

    a(0) =2a(1) =1a(2) =3a(3) =3a(4) =6a(5) =18a(6) =24a(7) =432a(8) =456a(9) =196992a(10) =197448a(11) =38895676416a(12) =38895873864

External references