Number of ways to reciprocally link elements of an n X n X n triangular array with themselves or a neighbor, with no more than 3 elements linked to themselves.
A271612
Number of ways to reciprocally link elements of an n X n X n triangular array with themselves or a neighbor, with no more than 3 elements linked to themselves.
Terms
- a(0) =1a(1) =4a(2) =17a(3) =114a(4) =2571a(5) =42702a(6) =216318a(7) =5622392a(8) =1491326272a(9) =101843558868
External references
- oeis: A271612