Number of 16X16X16 triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= n.

A166224

Number of 16X16X16 triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= n.

Terms

    a(0) =1a(1) =27376a(2) =166762668a(3) =342881668736

External references