A280580 - OEIS

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A280580 as a triangular array

										1
									1		1
								2		6		1
							5		30		15		1
						14		140		140		28		1
					42		630		1050		420		45		1
				132		2772		6930		4620		990		66		1
			429		12012		42042		42042		15015		2002		91		1
		1430		51480		240240		336336		180180		40040		3640		120		1
	4862		218790		1312740		2450448		1837836		612612		92820		6120		153		1

A280580 as a square array

1	1	2	5	14	42	132	429	1430	4862
1	6	30	140	630	2772	12012	51480	218790
1	15	140	1050	6930	42042	240240	1312740
1	28	420	4620	42042	336336	2450448
1	45	990	15015	180180	1837836
1	66	2002	40040	612612
1	91	3640	92820
1	120	6120
1	153
1

A280580 as an upper right triangle

1	1	2	5	14	42	132	429	1430	4862
	1	6	30	140	630	2772	12012	51480	218790
		1	15	140	1050	6930	42042	240240	1312740
			1	28	420	4620	42042	336336	2450448
				1	45	990	15015	180180	1837836
					1	66	2002	40040	612612
						1	91	3640	92820
							1	120	6120
								1	153
									1