A107230 - OEIS

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A107230 as a triangular array

											1
										1		1
									2		2		1
								3		6		3		1
							6		12		12		4		1
						10		30		30		20		5		1
					20		60		90		60		30		6		1
				35		140		210		210		105		42		7		1
			70		280		560		560		420		168		56		8		1
		126		630		1260		1680		1260		756		252		72		9		1
	252		1260		3150		4200		4200		2520		1260		360		90		10		1

A107230 as a square array

1	1	2	3	6	10	20	35	70	126	252
1	2	6	12	30	60	140	280	630	1260
1	3	12	30	90	210	560	1260	3150
1	4	20	60	210	560	1680	4200
1	5	30	105	420	1260	4200
1	6	42	168	756	2520
1	7	56	252	1260
1	8	72	360
1	9	90
1	10
1

A107230 as an upper right triangle

1	1	2	3	6	10	20	35	70	126	252
	1	2	6	12	30	60	140	280	630	1260
		1	3	12	30	90	210	560	1260	3150
			1	4	20	60	210	560	1680	4200
				1	5	30	105	420	1260	4200
					1	6	42	168	756	2520
						1	7	56	252	1260
							1	8	72	360
								1	9	90
									1	10
										1