A130026 - OEIS

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A130026 as a triangular array

									1
								2		1
							3		0		1
						4		3		0		1
					5		0		0		0		1
				6		5		4		0		0		1
			7		0		0		0		0		0		1
		8		7		0		5		0		0		0		1
	9		0		7		0		0		0		0		0		1
10		9		0		0		6		0		0		0		0		1

A130026 as a square array

1	2	3	4	5	6	7	8	9	10
1	0	3	0	5	0	7	0	9
1	0	0	4	0	0	7	0
1	0	0	0	5	0	0
1	0	0	0	0	6
1	0	0	0	0
1	0	0	0
1	0	0
1	0
1

A130026 as an upper right triangle

1	2	3	4	5	6	7	8	9	10
	1	0	3	0	5	0	7	0	9
		1	0	0	4	0	0	7	0
			1	0	0	0	5	0	0
				1	0	0	0	0	6
					1	0	0	0	0
						1	0	0	0
							1	0	0
								1	0
									1