A195245 Number of lower triangles of an n X n 0..5 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less

6, 84, 3776, 533142, 237368212, 333437946202, 1479091549959182, 20728220266936919766, 918037571811526229736636, 128523191925989407344147529338, 56883358880979630186940014533369490

Offset

1,1

Comments

Column 5 of A195248

Links

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

Example

Some solutions for n=5
..4..........2..........2..........1..........1..........3..........4
..2.4........2.4........1.2........3.1........2.3........2.2........3.4
..2.3.5......3.3.3......3.2.0......3.2.2......3.3.4......2.3.2......3.4.2
..4.4.5.4....2.2.3.4....4.2.0.2....3.4.3.2....5.3.4.4....1.1.3.4....4.4.3.2
..4.5.3.5.3..4.4.2.2.3..2.2.1.0.1..4.3.2.4.4..5.4.5.3.2..2.2.2.4.3..5.4.2.3.3

Crossrefs

Sequence in context: A318399 A171200 A365354 * A030031 A244961 A293455

Adjacent sequences: A195242 A195243 A195244 * A195246 A195247 A195248

Keyword

nonn

Author

R. H. Hardin Sep 13 2011

Status

approved