A004175 - OEIS

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A004175 as a triangular array

											1
										2		-1
									4		-4		0
								8		-12		0		2
							16		-32		0		16		0
						32		-80		0		80		0		-16
					64		-192		0		320		0		-192		0
				128		-448		0		1120		0		-1344		0		272
			256		-1024		0		3584		0		-7168		0		4352		0
		512		-2304		0		10752		0		-32256		0		39168		0		-7936
	1024

A004175 as a square array

1	2	4	8	16	32	64	128	256	512	1024
-1	-4	-12	-32	-80	-192	-448	-1024	-2304
0	0	0	0	0	0	0	0
2	16	80	320	1120	3584	10752
0	0	0	0	0	0
-16	-192	-1344	-7168	-32256
0	0	0	0
272	4352	39168
0	0
-7936

A004175 as an upper right triangle

1	2	4	8	16	32	64	128	256	512	1024
	-1	-4	-12	-32	-80	-192	-448	-1024	-2304
		0	0	0	0	0	0	0	0
			2	16	80	320	1120	3584	10752
				0	0	0	0	0	0
					-16	-192	-1344	-7168	-32256
						0	0	0	0
							272	4352	39168
								0	0
									-7936