A320409 - OEIS

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A320409 as a triangular array

										1
									2		2
								4		6		4
							8		14		14		8
						16		35		47		35		16
					32		95		156		156		95		32
				64		257		548		786		548		257		64
			128		700		1970		3761		3761		1970		700		128
		256		1907		7049		18725		27236		18725		7049		1907		256
	512		5202		25364		92578		191615		191615		92578

A320409 as a square array

1	2	4	8	16	32	64	128	256	512
2	6	14	35	95	257	700	1907	5202
4	14	47	156	548	1970	7049	25364
8	35	156	786	3761	18725	92578
16	95	548	3761	27236	191615
32	257	1970	18725	191615
64	700	7049	92578
128	1907
256

A320409 as an upper right triangle

1	2	4	8	16	32	64	128	256	512
	2	6	14	35	95	257	700	1907	5202
		4	14	47	156	548	1970	7049	25364
			8	35	156	786	3761	18725	92578
				16	95	548	3761	27236	191615
					32	257	1970	18725	191615
						64	700	7049	92578
							128	1907
								256