Number of 8X8X8 triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= n.

A166216

Number of 8X8X8 triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= n.

Terms

    a(0) =1a(1) =17a(2) =200a(3) =1588a(4) =9030a(5) =40848a(6) =157803a(7) =526484a(8) =1571016a(9) =4285591a(10) =10795845a(11) =25412877a(12) =56578703a(13) =119636627a(14) =241988291a(15) =470828929a(16) =884190706a(17) =1608280291a(18) =2844350256a(19) =4899912505a(20) =8243127504a(21) =13571819655a(22) =21901928396a(23) =34695730340

External references