A364509 - OEIS

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A364509 as a triangular array

									1
								1		4
							1		6		36
						1		16		90		400
					1		50		784		1680		4900
				1		168		8910		48400		34650		63504
			1		588		113256		2011100		3312400		756756		853776
		1		2112		1528436		96993024		503909070		240374016		17153136		11778624
	1		7722		21395520		5056527000		92279796840		133954543800		18116083216

A364509 as a square array

1	1	1	1	1	1	1	1	1
4	6	16	50	168	588	2112	7722
36	90	784	8910	113256	1528436	21395520
400	1680	48400	2011100	96993024	5056527000
4900	34650	3312400	503909070	92279796840
63504	756756	240374016	133954543800
853776	17153136	18116083216
11778624

A364509 as an upper right triangle

1	1	1	1	1	1	1	1	1
	4	6	16	50	168	588	2112	7722
		36	90	784	8910	113256	1528436	21395520
			400	1680	48400	2011100	96993024	5056527000
				4900	34650	3312400	503909070	92279796840
					63504	756756	240374016	133954543800
						853776	17153136	18116083216
							11778624