A081520 - OEIS

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A081520 as a triangular array

												1
											1		2
										1		3		6
									1		2		4		6
								1		5		10		15		20
							1		2		3		4		6		8
						1		7		14		21		28		35		42
					1		2		4		6		8		10		12		14
				1		3		6		9		12		15		18		21		24
			1		2		4		5		6		8		10		12		14		15
		1		11		22		33		44		55		66		77		88		99		110
	1		2		3		4		6		8		9		10		12		14		15		16
1		13		26		39		52		65		78

A081520 as a square array

1	1	1	1	1	1	1	1	1	1	1	1	1
2	3	2	5	2	7	2	3	2	11	2	13
6	4	10	3	14	4	6	4	22	3	26
6	15	4	21	6	9	5	33	4	39
20	6	28	8	12	6	44	6	52
8	35	10	15	8	55	8	65
42	12	18	10	66	9	78
14	21	12	77	10
24	14	88	12
15	99	14
110	15
16

A081520 as an upper right triangle

1	1	1	1	1	1	1	1	1	1	1	1	1
	2	3	2	5	2	7	2	3	2	11	2	13
		6	4	10	3	14	4	6	4	22	3	26
			6	15	4	21	6	9	5	33	4	39
				20	6	28	8	12	6	44	6	52
					8	35	10	15	8	55	8	65
						42	12	18	10	66	9	78
							14	21	12	77	10
								24	14	88	12
									15	99	14
										110	15
											16

												1
											1		2
										1		3		6
									1		2		4		6
								1		5		10		15		20
							1		2		3		4		6		8
						1		7		14		21		28		35		42
					1		2		4		6		8		10		12		14
				1		3		6		9		12		15		18		21		24
			1		2		4		5		6		8		10		12		14		15
		1		11		22		33		44		55		66		77		88		99		110
	1		2		3		4		6		8		9		10		12		14		15		16
1		13		26		39		52		65		78

1	1	1	1	1	1	1	1	1	1	1	1	1
2	3	2	5	2	7	2	3	2	11	2	13
6	4	10	3	14	4	6	4	22	3	26
6	15	4	21	6	9	5	33	4	39
20	6	28	8	12	6	44	6	52
8	35	10	15	8	55	8	65
42	12	18	10	66	9	78
14	21	12	77	10
24	14	88	12
15	99	14
110	15
16

1	1	1	1	1	1	1	1	1	1	1	1	1
	2	3	2	5	2	7	2	3	2	11	2	13
		6	4	10	3	14	4	6	4	22	3	26
			6	15	4	21	6	9	5	33	4	39
				20	6	28	8	12	6	44	6	52
					8	35	10	15	8	55	8	65
						42	12	18	10	66	9	78
							14	21	12	77	10
								24	14	88	12
									15	99	14
										110	15
											16

												1
											1		2
										1		3		6
									1		2		4		6
								1		5		10		15		20
							1		2		3		4		6		8
						1		7		14		21		28		35		42
					1		2		4		6		8		10		12		14
				1		3		6		9		12		15		18		21		24
			1		2		4		5		6		8		10		12		14		15
		1		11		22		33		44		55		66		77		88		99		110
	1		2		3		4		6		8		9		10		12		14		15		16
1		13		26		39		52		65		78

1	1	1	1	1	1	1	1	1	1	1	1	1
2	3	2	5	2	7	2	3	2	11	2	13
6	4	10	3	14	4	6	4	22	3	26
6	15	4	21	6	9	5	33	4	39
20	6	28	8	12	6	44	6	52
8	35	10	15	8	55	8	65
42	12	18	10	66	9	78
14	21	12	77	10
24	14	88	12
15	99	14
110	15
16

1	1	1	1	1	1	1	1	1	1	1	1	1
	2	3	2	5	2	7	2	3	2	11	2	13
		6	4	10	3	14	4	6	4	22	3	26
			6	15	4	21	6	9	5	33	4	39
				20	6	28	8	12	6	44	6	52
					8	35	10	15	8	55	8	65
						42	12	18	10	66	9	78
							14	21	12	77	10
								24	14	88	12
									15	99	14
										110	15
											16

												1
											1		2
										1		3		6
									1		2		4		6
								1		5		10		15		20
							1		2		3		4		6		8
						1		7		14		21		28		35		42
					1		2		4		6		8		10		12		14
				1		3		6		9		12		15		18		21		24
			1		2		4		5		6		8		10		12		14		15
		1		11		22		33		44		55		66		77		88		99		110
	1		2		3		4		6		8		9		10		12		14		15		16
1		13		26		39		52		65		78

1	1	1	1	1	1	1	1	1	1	1	1	1
2	3	2	5	2	7	2	3	2	11	2	13
6	4	10	3	14	4	6	4	22	3	26
6	15	4	21	6	9	5	33	4	39
20	6	28	8	12	6	44	6	52
8	35	10	15	8	55	8	65
42	12	18	10	66	9	78
14	21	12	77	10
24	14	88	12
15	99	14
110	15
16

1	1	1	1	1	1	1	1	1	1	1	1	1
	2	3	2	5	2	7	2	3	2	11	2	13
		6	4	10	3	14	4	6	4	22	3	26
			6	15	4	21	6	9	5	33	4	39
				20	6	28	8	12	6	44	6	52
					8	35	10	15	8	55	8	65
						42	12	18	10	66	9	78
							14	21	12	77	10
								24	14	88	12
									15	99	14
										110	15
											16