Number of nXnXn triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 8.
A166203
Number of nXnXn triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 8.
Terms
- a(0) =1a(1) =9a(2) =3a(3) =10a(4) =138a(5) =579a(6) =5166a(7) =172012a(8) =1571016a(9) =46316901a(10) =5087344969a(11) =113781268522
External references
- oeis: A166203