A303421 - OEIS

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A303421 as a triangular array

										1
									2		2
								4		8		4
							8		32		32		8
						16		128		252		128		16
					32		512		1985		1988		512		32
				64		2048		15647		30897		15684		2048		64
			128		8192		123337		480953		480960		123732		8192		128
		256		32768		972168		7486281		14783632		7486369		976132		32768		256
	512		131072

A303421 as a square array

1	2	4	8	16	32	64	128	256	512
2	8	32	128	512	2048	8192	32768	131072
4	32	252	1985	15647	123337	972168
8	128	1988	30897	480953	7486281
16	512	15684	480960	14783632
32	2048	123732	7486369
64	8192	976132
128	32768
256

A303421 as an upper right triangle

1	2	4	8	16	32	64	128	256	512
	2	8	32	128	512	2048	8192	32768	131072
		4	32	252	1985	15647	123337	972168
			8	128	1988	30897	480953	7486281
				16	512	15684	480960	14783632
					32	2048	123732	7486369
						64	8192	976132
							128	32768
								256