A117939 - OEIS

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A117939 as a triangular array

														1
													2		1
												1		-2		1
											2		0		0		1
										4		2		0		2		1
									2		-4		2		1		-2		1
								1		0		0		-2		0		0		1
							2		1		0		-4		-2		0		2		1
						1		-2		1		-2		4		-2		1		-2		1
					2		0		0		0		0		0		0		0		0		1
				4		2		0		0		0		0		0		0		0		2		1
			2		-4		2		0		0		0		0		0		0		1		-2		1
		4		0		0		2		0		0		0		0		0		2		0		0		1
	8		4		0		4		2		0		0		0		0		4		2		0		2		1

A117939 as a square array

1	2	1	2	4	2	1	2	1	2	4	2	4	8
1	-2	0	2	-4	0	1	-2	0	2	-4	0	4
1	0	0	2	0	0	1	0	0	2	0	0
1	2	1	-2	-4	-2	0	0	0	2	4
1	-2	0	-2	4	0	0	0	0	2
1	0	0	-2	0	0	0	0	0
1	2	1	0	0	0	0	0
1	-2	0	0	0	0	0
1	0	0	0	0	0
1	2	1	2	4
1	-2	0	2
1	0	0
1	2
1

A117939 as an upper right triangle

1	2	1	2	4	2	1	2	1	2	4	2	4	8
	1	-2	0	2	-4	0	1	-2	0	2	-4	0	4
		1	0	0	2	0	0	1	0	0	2	0	0
			1	2	1	-2	-4	-2	0	0	0	2	4
				1	-2	0	-2	4	0	0	0	0	2
					1	0	0	-2	0	0	0	0	0
						1	2	1	0	0	0	0	0
							1	-2	0	0	0	0	0
								1	0	0	0	0	0
									1	2	1	2	4
										1	-2	0	2
											1	0	0
												1	2
													1