A257610 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A257610 as a triangular array

								1
							2		2
						4		20		4
					8		132		132		8
				16		748		2112		748		16
			32		3964		25124		25124		3964		32
		64		20364		256488		552728		256488		20364		64
	128		103100		2398092		9670840		9670840		2398092		103100		128
256		518444		21246736		147146804		270783520		147146804		21246736		518444		256

A257610 as a square array

1	2	4	8	16	32	64	128	256
2	20	132	748	3964	20364	103100	518444
4	132	2112	25124	256488	2398092	21246736
8	748	25124	552728	9670840	147146804
16	3964	256488	9670840	270783520
32	20364	2398092	147146804
64	103100	21246736
128	518444
256

A257610 as an upper right triangle

1	2	4	8	16	32	64	128	256
	2	20	132	748	3964	20364	103100	518444
		4	132	2112	25124	256488	2398092	21246736
			8	748	25124	552728	9670840	147146804
				16	3964	256488	9670840	270783520
					32	20364	2398092	147146804
						64	103100	21246736
							128	518444
								256