Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 12.
A154086
Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 12.
Terms
- a(0) =6864a(1) =38731a(2) =89236a(3) =192947a(4) =244956a(5) =380962a(6) =449908a(7) =332543a(8) =208807a(9) =111992a(10) =56454a(11) =30336a(12) =15354a(13) =12787a(14) =12323a(15) =12236a(16) =14364a(17) =12235a(18) =12235a(19) =12235a(20) =12235a(21) =14364a(22) =12235a(23) =12235a(24) =12235a(25) =12235a(26) =14364a(27) =12235a(28) =12235a(29) =12235
External references
- oeis: A154086