A235852 Number of (n+1)X(3+1) 0..3 arrays with the upper median equal to the lower median in every 2X2 subblock

4524, 121244, 2848572, 73075844, 1811192156, 45872598284, 1149967012292, 29010506163148, 729346430166612, 18375276080260980, 462368150916799188, 11643521929920219196, 293068046135275777448, 7378831046335957309140

Offset

1,1

Comments

Column 3 of A235856

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 43

Formula

Empirical recurrence of order 43 (see link above)

Example

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

Crossrefs

Sequence in context: A234425 A209955 A104845 * A138731 A250450 A339795

Adjacent sequences: A235849 A235850 A235851 * A235853 A235854 A235855

Keyword

nonn

Author

R. H. Hardin, Jan 16 2014

Status

approved