A257606 - OEIS

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A257606 as a triangular array

									1
								4		4
							16		40		16
						64		296		296		64
					256		1928		3552		1928		256
				1024		11688		34808		34808		11688		1024
			4096		67656		302352		487312		302352		67656		4096
		16384		379240		2423016		5830000		5830000		2423016		379240		16384
	65536		2076424		18330496		62617144		93280000		62617144		18330496		2076424		65536

A257606 as a square array

1	4	16	64	256	1024	4096	16384	65536
4	40	296	1928	11688	67656	379240	2076424
16	296	3552	34808	302352	2423016	18330496
64	1928	34808	487312	5830000	62617144
256	11688	302352	5830000	93280000
1024	67656	2423016	62617144
4096	379240	18330496
16384	2076424
65536

A257606 as an upper right triangle

1	4	16	64	256	1024	4096	16384	65536
	4	40	296	1928	11688	67656	379240	2076424
		16	296	3552	34808	302352	2423016	18330496
			64	1928	34808	487312	5830000	62617144
				256	11688	302352	5830000	93280000
					1024	67656	2423016	62617144
						4096	379240	18330496
							16384	2076424
								65536