A281871 - OEIS

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A281871 as a triangular array

													1
												1		1
											1		1		0
										1		1		1		0
									1		2		1		1		0
								1		2		2		2		0		0
							1		2		3		3		2		1		0
						1		2		4		5		5		2		1		0
					1		2		5		8		8		6		3		0		1
				1		3		6		11		14		13		7		4		1		0
			1		3		7		15		23		24		19		10		3		1		0
		1		3		8		20		34		43		39		25		13		3		1		0
	1		3		9		26		49		71		74		60		34		14		5		0		0

A281871 as a square array

1	1	1	1	1	1	1	1	1	1	1	1	1
1	1	1	2	2	2	2	2	3	3	3	3
0	1	1	2	3	4	5	6	7	8	9
0	1	2	3	5	8	11	15	20	26
0	0	2	5	8	14	23	34	49
0	1	2	6	13	24	43	71
0	1	3	7	19	39	74
0	0	4	10	25	60
1	1	3	13	34
0	1	3	14
0	1	5
0	0
0

A281871 as an upper right triangle

1	1	1	1	1	1	1	1	1	1	1	1	1
	1	1	1	2	2	2	2	2	3	3	3	3
		0	1	1	2	3	4	5	6	7	8	9
			0	1	2	3	5	8	11	15	20	26
				0	0	2	5	8	14	23	34	49
					0	1	2	6	13	24	43	71
						0	1	3	7	19	39	74
							0	0	4	10	25	60
								1	1	3	13	34
									0	1	3	14
										0	1	5
											0	0
												0