a(n)=f(a(n-1),a(n-2)+1,a(n-3)), where f(x,y,z)=yz+zx+xy and (a(1),a(2),a(3))=(0,0,1).
A203762
a(n)=f(a(n-1),a(n-2)+1,a(n-3)), where f(x,y,z)=yz+zx+xy and (a(1),a(2),a(3))=(0,0,1).
Terms
- a(0) =0a(1) =0a(2) =1a(3) =1a(4) =2a(5) =8a(6) =35a(7) =403a(8) =18020a(9) =7924920a(10) =146015988543
External references
- oeis: A203762