A228273 - OEIS

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A228273 as a triangular array

										1
									0		1
								0		2		2
							0		18		6		3
						0		192		48		12		4
					0		2500		500		100		20		5
				0		38880		6480		1080		180		30		6
			0		705894		100842		14406		2058		294		42		7
		0		14680064		1835008		229376		28672		3584		448		56		8
	0		344373768		38263752		4251528		472392		52488		5832		648		72		9

A228273 as a square array

1	0	0	0	0	0	0	0	0	0
1	2	18	192	2500	38880	705894	14680064	344373768
2	6	48	500	6480	100842	1835008	38263752
3	12	100	1080	14406	229376	4251528
4	20	180	2058	28672	472392
5	30	294	3584	52488
6	42	448	5832
7	56	648
8	72
9

A228273 as an upper right triangle

1	0	0	0	0	0	0	0	0	0
	1	2	18	192	2500	38880	705894	14680064	344373768
		2	6	48	500	6480	100842	1835008	38263752
			3	12	100	1080	14406	229376	4251528
				4	20	180	2058	28672	472392
					5	30	294	3584	52488
						6	42	448	5832
							7	56	648
								8	72
									9