Number of nXnXn triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 3.
A166198
Number of nXnXn triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 3.
Terms
- a(0) =1a(1) =4a(2) =2a(3) =3a(4) =14a(5) =30a(6) =89a(7) =553a(8) =1588a(9) =8865a(10) =104510a(11) =444424a(12) =4173156a(13) =81325310a(14) =652489468a(15) =10459516337a(16) =342881668736
External references
- oeis: A166198