A204387 - OEIS

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A204387 as a triangular array

												1
											0		1
										0		2		1
									0		0		4		1
								0		0		3		6		1
							0		0		4		10		8		1
						0		0		0		12		21		10		1
					0		0		0		12		32		36		12		1
				0		0		0		6		45		72		55		14		1
			0		0		0		8		36		119		140		78		16		1
		0		0		0		0		46		144		270		244		105		18		1
	0		0		0		0		32		164		416		550		392		136		20		1

A204387 as a square array

1	0	0	0	0	0	0	0	0	0	0	0
1	2	0	0	0	0	0	0	0	0	0
1	4	3	4	0	0	0	0	0	0
1	6	10	12	12	6	8	0	0
1	8	21	32	45	36	46	32
1	10	36	72	119	144	164
1	12	55	140	270	416
1	14	78	244	550
1	16	105	392
1	18	136
1	20
1

A204387 as an upper right triangle

1	0	0	0	0	0	0	0	0	0	0	0
	1	2	0	0	0	0	0	0	0	0	0
		1	4	3	4	0	0	0	0	0	0
			1	6	10	12	12	6	8	0	0
				1	8	21	32	45	36	46	32
					1	10	36	72	119	144	164
						1	12	55	140	270	416
							1	14	78	244	550
								1	16	105	392
									1	18	136
										1	20
											1