A222841 Number of n X 4 0..3 arrays with no more than floor(n X 4/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.

11, 1585, 326408, 70144361, 15371324917, 3410802057085, 763478480305913, 172013012570239087, 38951066890039501260, 8855947103673731502351, 2020193746874015711217978, 462122926444094400382307495

Offset

1,1

Comments

Column 4 of A222842.

Links

R. H. Hardin, Table of n, a(n) for n = 1..20

Example

Some solutions for n=3
..0..1..0..2....0..1..0..1....0..1..1..2....0..1..0..2....0..1..0..2
..2..1..2..1....0..0..2..0....0..0..3..1....2..2..1..0....3..1..2..3
..1..0..3..3....1..1..3..1....2..1..0..2....1..2..2..0....1..3..1..2

Crossrefs

Cf. A222842.

Sequence in context: A076168 A053884 A027880 * A287035 A297004 A308155

Adjacent sequences: A222838 A222839 A222840 * A222842 A222843 A222844

Keyword

nonn

Author

R. H. Hardin Mar 06 2013

Status

approved