A171830 - OEIS

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A171830 as a triangular array

									1
								2		2
							3		4		3
						16		24		24		16
					45		144		162		144		45
				192		480		1152		1152		480		192
			1050		2400		4500		9600		4500		2400		1050
		6912		15120		25920		43200		43200		25920		15120		6912
	52920		112896		185220		282240		220500		282240		185220		112896		52920

A171830 as a square array

1	2	3	16	45	192	1050	6912	52920
2	4	24	144	480	2400	15120	112896
3	24	162	1152	4500	25920	185220
16	144	1152	9600	43200	282240
45	480	4500	43200	220500
192	2400	25920	282240
1050	15120	185220
6912	112896
52920

A171830 as an upper right triangle

1	2	3	16	45	192	1050	6912	52920
	2	4	24	144	480	2400	15120	112896
		3	24	162	1152	4500	25920	185220
			16	144	1152	9600	43200	282240
				45	480	4500	43200	220500
					192	2400	25920	282240
						1050	15120	185220
							6912	112896
								52920