A236879 Number of (n+1) X (3+1) 0..2 arrays with the maximum plus the upper median plus the lower median of every 2 X 2 subblock equal.

537, 2111, 7900, 40199, 189527, 1031110, 5389465, 30143115, 165929972, 944003155, 5344612635, 30772376030, 177071735521, 1028182698707, 5974708787086, 34897441921851, 204032291698675, 1196536094450238, 7023128154032847

Offset

1,1

Comments

Column 3 of A236884.

Links

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

R. H. Hardin, Empirical recurrence of order 63

Formula

Empirical recurrence of order 63 (see link above).

Example

Some solutions for n=5:
..1..2..1..2....1..2..2..1....1..1..1..1....0..2..2..2....1..2..0..2
..2..2..2..2....2..1..1..2....1..2..0..2....2..2..2..2....1..2..1..2
..2..0..2..1....1..2..2..1....0..1..1..1....2..1..2..2....0..2..1..2
..2..2..2..2....2..1..0..2....1..2..1..2....2..2..2..2....1..2..1..2
..1..2..2..2....1..2..2..1....0..1..1..1....2..2..2..2....0..2..1..2
..2..2..2..1....2..1..1..2....1..2..0..2....2..1..2..0....2..1..2..0

Crossrefs

Cf. A236884.

Sequence in context: A250709 A077076 A033916 * A206067 A183725 A235780

Adjacent sequences: A236876 A236877 A236878 * A236880 A236881 A236882

Keyword

nonn

Author

R. H. Hardin, Feb 01 2014

Status

approved