A280499 - OEIS

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A280499 as a triangular array

															1
														2		1
													3		0		1
												4		2		0		1
											5		0		3		0		1
										6		3		2		0		0		1
									7		0		0		0		0		0		1
								8		4		0		2		0		0		0		1
							9		0		7		0		0		0		3		0		1
						10		5		6		0		2		3		0		0		0		1
					11		0		0		0		0		0		0		0		0		0		1
				12		6		4		3		0		2		0		0		0		0		0		1
			13		0		0		0		0		0		0		0		0		0		0		0		1
		14		7		0		0		0		0		2		0		0		0		0		0		0		1
	15		0		5		0		3		0		0		0		0		0		0		0		0		0		1

A280499 as a square array

1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
1	0	2	0	3	0	4	0	5	0	6	0	7	0
1	0	3	2	0	0	7	6	0	4	0	0	5
1	0	0	0	2	0	0	0	3	0	0	0
1	0	0	0	0	2	0	0	0	0	3
1	0	0	0	3	0	2	0	0	0
1	0	3	0	0	0	0	2	0
1	0	0	0	0	0	0	0
1	0	0	0	0	0	0
1	0	0	0	0	0
1	0	0	0	0
1	0	0	0
1	0	0
1	0
1

A280499 as an upper right triangle

1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
	1	0	2	0	3	0	4	0	5	0	6	0	7	0
		1	0	3	2	0	0	7	6	0	4	0	0	5
			1	0	0	0	2	0	0	0	3	0	0	0
				1	0	0	0	0	2	0	0	0	0	3
					1	0	0	0	3	0	2	0	0	0
						1	0	3	0	0	0	0	2	0
							1	0	0	0	0	0	0	0
								1	0	0	0	0	0	0
									1	0	0	0	0	0
										1	0	0	0	0
											1	0	0	0
												1	0	0
													1	0
														1