Number of 6 X 6 X 6 triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= n.
A166214
Number of 6 X 6 X 6 triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= n.
Terms
- a(0) =1a(1) =6a(2) =26a(3) =89a(4) =249a(5) =604a(6) =1340a(7) =2718a(8) =5166a(9) =9309a(10) =16010a(11) =26443a(12) =42285a(13) =65576a(14) =99088a(15) =146337a(16) =211677a(17) =300467a(18) =419570a(19) =576863a(20) =782184a(21) =1047233a(22) =1385738a(23) =1813757a(24) =2350697a(25) =3018141a(26) =3841784a(27) =4851076a(28) =6079477a(29) =7564937
External references
- oeis: A166214