A001497 - OEIS

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A001497 as a triangular array

										1
									1		1
								3		3		1
							15		15		6		1
						105		105		45		10		1
					945		945		420		105		15		1
				10395		10395		4725		1260		210		21		1
			135135		135135		62370		17325		3150		378		28		1
		2027025		2027025		945945		270270		51975		6930		630		36		1
	34459425		34459425		16216200		4729725		945945		135135		13860		990		45		1

A001497 as a square array

1	1	3	15	105	945	10395	135135	2027025	34459425
1	3	15	105	945	10395	135135	2027025	34459425
1	6	45	420	4725	62370	945945	16216200
1	10	105	1260	17325	270270	4729725
1	15	210	3150	51975	945945
1	21	378	6930	135135
1	28	630	13860
1	36	990
1	45
1

A001497 as an upper right triangle

1	1	3	15	105	945	10395	135135	2027025	34459425
	1	3	15	105	945	10395	135135	2027025	34459425
		1	6	45	420	4725	62370	945945	16216200
			1	10	105	1260	17325	270270	4729725
				1	15	210	3150	51975	945945
					1	21	378	6930	135135
						1	28	630	13860
							1	36	990
								1	45
									1