A109618 Half the number of nXnXn triangular binary arrays with the sum of each element's NW E SW neighbors unequal to the sum of its NE W SE neighbors

0, 0, 0, 2, 8, 56, 482, 6374, 116980, 3089024, 115321068, 6150672392

Offset

1,4

Links

Table of n, a(n) for n=1..12.

Example

Some solutions for 6X6X6 with summit=0
.......0............0............0............0............0............0
......0.1..........1.0..........1.0..........0.1..........1.0..........1.0
.....0.0.1........0.1.1........1.0.1........1.1.0........0.1.1........0.1.1
....0.1.0.0......0.1.1.1......1.1.0.1......1.1.0.1......1.0.1.1......0.1.0.0
...1.1.0.1.1....1.1.0.1.0....0.1.0.0.0....1.0.0.0.1....1.0.0.0.1....0.0.0.1.0
..0.0.1.1.0.0..0.0.1.0.1.0..0.1.0.1.1.0..0.0.1.1.0.0..0.0.1.1.0.0..0.1.1.0.1.1

Crossrefs

Equal sums gives A023022(n+2).

Sequence in context: A366267 A308501 A316142 * A201128 A277498 A097691

Adjacent sequences: A109615 A109616 A109617 * A109619 A109620 A109621

Keyword

nonn,more

Author

R. H. Hardin, Jul 02 2011

Status

approved