A178923 - OEIS

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A178923 as a triangular array

									1
								0		0
							0		2		0
						0		2		0		0
					0		2		6		0		0
				0		2		18		0		0		0
			0		2		42		24		0		0		0
		0		2		90		144		0		0		0		0
	0		2		186		600		120		0		0		0		0
0		2		378		2160		1200		0		0		0		0		0

A178923 as a square array

1	0	0	0	0	0	0	0	0	0
0	2	2	2	2	2	2	2	2
0	0	6	18	42	90	186	378
0	0	0	24	144	600	2160
0	0	0	0	120	1200
0	0	0	0	0
0	0	0	0
0	0	0
0	0
0

A178923 as an upper right triangle

1	0	0	0	0	0	0	0	0	0
	0	2	2	2	2	2	2	2	2
		0	0	6	18	42	90	186	378
			0	0	0	24	144	600	2160
				0	0	0	0	120	1200
					0	0	0	0	0
						0	0	0	0
							0	0	0
								0	0
									0