A205456 - OEIS

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A205456 as a triangular array

												1
											2		2
										3		1		3
									4		3		3		4
								5		6		1		6		5
							6		10		4		4		10		6
						7		15		10		1		10		15		7
					8		21		20		5		5		20		21		8
				9		28		35		15		1		15		35		28		9
			10		36		56		35		6		6		35		56		36		10
		11		45		84		70		21		1		21		70		84		45		11
	12		55		120		126		56		7		7		56		126		120

A205456 as a square array

1	2	3	4	5	6	7	8	9	10	11	12
2	1	3	6	10	15	21	28	36	45	55
3	3	1	4	10	20	35	56	84	120
4	6	4	1	5	15	35	70	126
5	10	10	5	1	6	21	56
6	15	20	15	6	1	7
7	21	35	35	21	7
8	28	56	70	56
9	36	84	126
10	45	120
11

A205456 as an upper right triangle

1	2	3	4	5	6	7	8	9	10	11	12
	2	1	3	6	10	15	21	28	36	45	55
		3	3	1	4	10	20	35	56	84	120
			4	6	4	1	5	15	35	70	126
				5	10	10	5	1	6	21	56
					6	15	20	15	6	1	7
						7	21	35	35	21	7
							8	28	56	70	56
								9	36	84	126
									10	45	120
										11