A264872 - OEIS

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A264872 as a triangular array

										1
									2		2
								4		6		4
							8		18		20		8
						16		54		100		72		16
					32		162		500		648		272		32
				64		486		2500		5832		4624		1056		64
			128		1458		12500		52488		78608		34848		4160		128
		256		4374		62500		472392		1336336		1149984		270400		16512		256
	512		13122		312500

A264872 as a square array

1	2	4	8	16	32	64	128	256	512
2	6	18	54	162	486	1458	4374	13122
4	20	100	500	2500	12500	62500	312500
8	72	648	5832	52488	472392
16	272	4624	78608	1336336
32	1056	34848	1149984
64	4160	270400
128	16512
256

A264872 as an upper right triangle

1	2	4	8	16	32	64	128	256	512
	2	6	18	54	162	486	1458	4374	13122
		4	20	100	500	2500	12500	62500	312500
			8	72	648	5832	52488	472392
				16	272	4624	78608	1336336
					32	1056	34848	1149984
						64	4160	270400
							128	16512
								256