A224262 -id:A224262 - cp's OEIS frontend

A224267 Number of 7 X n 0..2 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.

36, 1296, 24842, 296646, 2485967, 15921905, 83124099, 371699763, 1478187738, 5375576014, 18237850918, 58547208334, 179599458173, 530112786109, 1512954573026, 4190185564746, 11292006460221, 29674041029167, 76177448992499, 191331238729653, 470802086175412

Offset: 1

R. H. Hardin, Apr 02 2013

nonn

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

R. H. Hardin, Table of n, a(n) for n = 1..41
R. H. Hardin, Empirical polynomial of degree 28

Row 7 of A224262.

Empirical polynomial of degree 28 (see link above).

Name corrected by Andrew Howroyd, Mar 18 2025

A224256 Number of n X n 0..2 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.

Original entry on oeis.org

3, 36, 648, 12467, 238366, 4480391, 83124099, 1530419762, 28072690614, 514262753781, 9420094252771

Offset: 1

R. H. Hardin, Apr 02 2013

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

Main diagonal of A224262.

Name corrected by Andrew Howroyd, Mar 18 2025

cp's OEIS Frontend

A224267 Number of 7 X n 0..2 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.

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