Number of nXnXn triangular binary arrays with all 1s connected, no 1 having more than 2 1s adjacent, and a path of 1s from peak vertex to anywhere on the bottom side.
A163881
Number of nXnXn triangular binary arrays with all 1s connected, no 1 having more than 2 1s adjacent, and a path of 1s from peak vertex to anywhere on the bottom side.
Terms
- a(0) =1a(1) =3a(2) =6a(3) =20a(4) =82a(5) =430a(6) =2890a(7) =25268a(8) =289456a(9) =4331282
External references
- oeis: A163881