A199530 - OEIS

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A199530 as a triangular array

											1
										1		2
									1		4		6
								1		6		18		12
							1		8		36		72		32
						1		10		60		212		320		80
					1		12		90		464		1324		1414		200
				1		14		126		860		3734		8342		6346		520
			1		16		168		1432		8470		30484		53302		28766		1336
		1		18		216		2212		16682		84852		252154		343710		131246		3472
	1		20		270

A199530 as a square array

1	1	1	1	1	1	1	1	1	1	1
2	4	6	8	10	12	14	16	18	20
6	18	36	60	90	126	168	216	270
12	72	212	464	860	1432	2212
32	320	1324	3734	8470	16682
80	1414	8342	30484	84852
200	6346	53302	252154
520	28766	343710
1336	131246
3472

A199530 as an upper right triangle

1	1	1	1	1	1	1	1	1	1	1
	2	4	6	8	10	12	14	16	18	20
		6	18	36	60	90	126	168	216	270
			12	72	212	464	860	1432	2212
				32	320	1324	3734	8470	16682
					80	1414	8342	30484	84852
						200	6346	53302	252154
							520	28766	343710
								1336	131246
									3472