A204173 - OEIS

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A204173 as a triangular array

														1
													0		0
												2		0		2
											0		2		2		0
										3		0		2		0		3
									0		3		0		0		3		0
								4		0		3		0		3		0		4
							0		4		0		3		3		0		4		0
						5		0		4		0		3		0		4		0		5
					0		5		0		4		0		0		4		0		5		0
				6		0		5		0		4		0		4		0		5		0		6
			0		6		0		5		0		4		4		0		5		0		6		0
		7		0		6		0		5		0		4		0		5		0		6		0		7
	0		7		0		6		0		5		0		0

A204173 as a square array

1	0	2	0	3	0	4	0	5	0	6	0	7	0
0	0	2	0	3	0	4	0	5	0	6	0	7
2	2	2	0	3	0	4	0	5	0	6	0
0	0	0	0	3	0	4	0	5	0	6
3	3	3	3	3	0	4	0	5	0
0	0	0	0	0	0	4	0	5
4	4	4	4	4	4	4	0
0	0	0	0	0	0	0
5	5	5	5	5
0	0	0	0
6	6	6
0	0
7

A204173 as an upper right triangle

1	0	2	0	3	0	4	0	5	0	6	0	7	0
	0	0	2	0	3	0	4	0	5	0	6	0	7
		2	2	2	0	3	0	4	0	5	0	6	0
			0	0	0	0	3	0	4	0	5	0	6
				3	3	3	3	3	0	4	0	5	0
					0	0	0	0	0	0	4	0	5
						4	4	4	4	4	4	4	0
							0	0	0	0	0	0	0
								5	5	5	5	5
									0	0	0	0
										6	6	6
											0	0
												7