A194618 Half the number of lower triangles of a 5X5 0..n array with no element equal to the average of its horizontal and vertical neighbors

849, 571364, 86867366, 3703163910, 73569838704, 873084601728, 7416076339907, 47683223919057, 251059904306865, 1116910109397146, 4348691274427714, 15090969268080476, 47709109611064061, 138700124724207796

Offset

1,1

Comments

Row 4 of A194615

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

Some solutions for n=2
..0..........0..........0..........0..........0..........0..........0
..2.0........2.0........2.0........1.0........2.0........1.0........2.0
..2.0.2......0.2.0......0.1.0......1.0.1......0.2.1......1.0.2......0.1.0
..2.2.0.1....1.2.2.0....1.1.0.1....0.1.1.2....0.1.2.0....1.0.0.0....2.2.2.0
..1.1.1.1.2..2.2.1.0.1..0.0.2.1.2..0.1.1.0.1..2.2.0.2.0..0.1.0.2.0..0.2.0.0.2

Crossrefs

Sequence in context: A247532 A235065 A268112 * A252546 A251257 A372114

Adjacent sequences: A194615 A194616 A194617 * A194619 A194620 A194621

Keyword

nonn

Author

R. H. Hardin Aug 30 2011

Status

approved