A180987 - OEIS

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A180987 as a triangular array

													2
												1		3
											0		3		4
										0		1		6		5
									0		0		4		10		6
								0		0		1		10		15		7
							0		0		0		5		20		21		8
						0		0		0		1		15		35		28		9
					0		0		0		0		6		35		56		36		10
				0		0		0		0		1		21		70		84		45		11
			0		0		0		0		0		7		56		126		120		55		12
		0		0		0		0		0		1		28		126		210		165		66		13
	0		0		0		0		0		0		8		84		252		330

A180987 as a square array

2	1	0	0	0	0	0	0	0	0	0	0	0
3	3	1	0	0	0	0	0	0	0	0	0
4	6	4	1	0	0	0	0	0	0	0
5	10	10	5	1	0	0	0	0	0
6	15	20	15	6	1	0	0	0
7	21	35	35	21	7	1	0
8	28	56	70	56	28	8
9	36	84	126	126	84
10	45	120	210	252
11	55	165	330
12	66
13

A180987 as an upper right triangle

2	1	0	0	0	0	0	0	0	0	0	0	0
	3	3	1	0	0	0	0	0	0	0	0	0
		4	6	4	1	0	0	0	0	0	0	0
			5	10	10	5	1	0	0	0	0	0
				6	15	20	15	6	1	0	0	0
					7	21	35	35	21	7	1	0
						8	28	56	70	56	28	8
							9	36	84	126	126	84
								10	45	120	210	252
									11	55	165	330
										12	66
											13