A220691 - OEIS

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A220691 as a triangular array

												0
											0		1
										0		0		3
									0		1		1		6
								0		0		1		2		10
							0		0		1		2		4		15
						0		0		1		1		4		6		21
					0		0		0		2		2		5		9		28
				0		0		0		1		2		3		7		12		36
			0		0		0		1		2		3		5		10		16		45
		0		0		0		0		2		2		4		6		12		20		55
	0		0		0		0		1		3		3		6		8		15		25		66
0		0		0		0

A220691 as a square array

0	0	0	0	0	0	0	0	0	0	0	0	0
1	0	1	0	0	0	0	0	0	0	0	0
3	1	1	1	1	0	0	0	0	0	0
6	2	2	1	2	1	1	0	0	0
10	4	4	2	2	2	2	1
15	6	5	3	3	2	3
21	9	7	5	4	3
28	12	10	6	6
36	16	12	8
45	20	15
55	25
66

A220691 as an upper right triangle

0	0	0	0	0	0	0	0	0	0	0	0	0
	1	0	1	0	0	0	0	0	0	0	0	0
		3	1	1	1	1	0	0	0	0	0	0
			6	2	2	1	2	1	1	0	0	0
				10	4	4	2	2	2	2	1
					15	6	5	3	3	2	3
						21	9	7	5	4	3
							28	12	10	6	6
								36	16	12	8
									45	20	15
										55	25
											66

												0
											0		1
										0		0		3
									0		1		1		6
								0		0		1		2		10
							0		0		1		2		4		15
						0		0		1		1		4		6		21
					0		0		0		2		2		5		9		28
				0		0		0		1		2		3		7		12		36
			0		0		0		1		2		3		5		10		16		45
		0		0		0		0		2		2		4		6		12		20		55
	0		0		0		0		1		3		3		6		8		15		25		66
0		0		0		0

0	0	0	0	0	0	0	0	0	0	0	0	0
1	0	1	0	0	0	0	0	0	0	0	0
3	1	1	1	1	0	0	0	0	0	0
6	2	2	1	2	1	1	0	0	0
10	4	4	2	2	2	2	1
15	6	5	3	3	2	3
21	9	7	5	4	3
28	12	10	6	6
36	16	12	8
45	20	15
55	25
66

0	0	0	0	0	0	0	0	0	0	0	0	0
	1	0	1	0	0	0	0	0	0	0	0	0
		3	1	1	1	1	0	0	0	0	0	0
			6	2	2	1	2	1	1	0	0	0
				10	4	4	2	2	2	2	1
					15	6	5	3	3	2	3
						21	9	7	5	4	3
							28	12	10	6	6
								36	16	12	8
									45	20	15
										55	25
											66

												0
											0		1
										0		0		3
									0		1		1		6
								0		0		1		2		10
							0		0		1		2		4		15
						0		0		1		1		4		6		21
					0		0		0		2		2		5		9		28
				0		0		0		1		2		3		7		12		36
			0		0		0		1		2		3		5		10		16		45
		0		0		0		0		2		2		4		6		12		20		55
	0		0		0		0		1		3		3		6		8		15		25		66
0		0		0		0

0	0	0	0	0	0	0	0	0	0	0	0	0
1	0	1	0	0	0	0	0	0	0	0	0
3	1	1	1	1	0	0	0	0	0	0
6	2	2	1	2	1	1	0	0	0
10	4	4	2	2	2	2	1
15	6	5	3	3	2	3
21	9	7	5	4	3
28	12	10	6	6
36	16	12	8
45	20	15
55	25
66

0	0	0	0	0	0	0	0	0	0	0	0	0
	1	0	1	0	0	0	0	0	0	0	0	0
		3	1	1	1	1	0	0	0	0	0	0
			6	2	2	1	2	1	1	0	0	0
				10	4	4	2	2	2	2	1
					15	6	5	3	3	2	3
						21	9	7	5	4	3
							28	12	10	6	6
								36	16	12	8
									45	20	15
										55	25
											66

												0
											0		1
										0		0		3
									0		1		1		6
								0		0		1		2		10
							0		0		1		2		4		15
						0		0		1		1		4		6		21
					0		0		0		2		2		5		9		28
				0		0		0		1		2		3		7		12		36
			0		0		0		1		2		3		5		10		16		45
		0		0		0		0		2		2		4		6		12		20		55
	0		0		0		0		1		3		3		6		8		15		25		66
0		0		0		0

0	0	0	0	0	0	0	0	0	0	0	0	0
1	0	1	0	0	0	0	0	0	0	0	0
3	1	1	1	1	0	0	0	0	0	0
6	2	2	1	2	1	1	0	0	0
10	4	4	2	2	2	2	1
15	6	5	3	3	2	3
21	9	7	5	4	3
28	12	10	6	6
36	16	12	8
45	20	15
55	25
66

0	0	0	0	0	0	0	0	0	0	0	0	0
	1	0	1	0	0	0	0	0	0	0	0	0
		3	1	1	1	1	0	0	0	0	0	0
			6	2	2	1	2	1	1	0	0	0
				10	4	4	2	2	2	2	1
					15	6	5	3	3	2	3
						21	9	7	5	4	3
							28	12	10	6	6
								36	16	12	8
									45	20	15
										55	25
											66