A204168 - OEIS

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A204168 as a triangular array

											2
										-1		-1
									-6		1		0
								6		12		-1		0
							0		-20		-20		1		0
						0		0		50		30		-1		0
					0		0		0		-105		-42		1		0
				0		0		0		0		196		56		-1		0
			0		0		0		0		0		-336		-72		1		0
		0		0		0		0		0		0		540		90		-1		0
	0		0		0		0		0		0		0		-825		-110		1

A204168 as a square array

2	-1	-6	6	0	0	0	0	0	0	0
-1	1	12	-20	0	0	0	0	0	0
0	-1	-20	50	0	0	0	0	0
0	1	30	-105	0	0	0	0
0	-1	-42	196	0	0	0
0	1	56	-336	0	0
0	-1	-72	540	0
0	1	90	-825
0	-1	-110
0	1

A204168 as an upper right triangle

2	-1	-6	6	0	0	0	0	0	0	0
	-1	1	12	-20	0	0	0	0	0	0
		0	-1	-20	50	0	0	0	0	0
			0	1	30	-105	0	0	0	0
				0	-1	-42	196	0	0	0
					0	1	56	-336	0	0
						0	-1	-72	540	0
							0	1	90	-825
								0	-1	-110
									0	1