A224184 Number of n X n 0..2 arrays with rows unimodal and columns nondecreasing.

3, 36, 684, 15779, 408222, 11444292, 340780382, 10635858679, 344674481333, 11518916935288, 394956511554556, 13839075880034056, 494013661434533634, 17921279299283914328, 659361786079631903704, 24563166523294240335463

Offset: 1

Author

R. H. Hardin Apr 01 2013

Keywords

• nonn

Comments

Diagonal of A224190

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..19