A121757 - OEIS

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A121757 as a triangular array

										1
									1		2
								1		4		6
							1		6		18		24
						1		8		36		96		120
					1		10		60		240		600		720
				1		12		90		480		1800		4320		5040
			1		14		126		840		4200		15120		35280		40320
		1		16		168		1344		8400		40320		141120		322560		362880
	1		18		216		2016		15120		90720		423360		1451520

A121757 as a square array

1	1	1	1	1	1	1	1	1	1
2	4	6	8	10	12	14	16	18
6	18	36	60	90	126	168	216
24	96	240	480	840	1344	2016
120	600	1800	4200	8400	15120
720	4320	15120	40320	90720
5040	35280	141120	423360
40320	322560	1451520
362880

A121757 as an upper right triangle

1	1	1	1	1	1	1	1	1	1
	2	4	6	8	10	12	14	16	18
		6	18	36	60	90	126	168	216
			24	96	240	480	840	1344	2016
				120	600	1800	4200	8400	15120
					720	4320	15120	40320	90720
						5040	35280	141120	423360
							40320	322560	1451520
								362880