A305457 - OEIS

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A305457 as a triangular array

											0
										0		0
									0		3		0
								0		5		5		0
							0		18		14		18		0
						0		61		69		69		61		0
					0		209		376		661		376		209		0
				0		702		1891		5580		5580		1891		702		0
			0		2381		9889		48148		79810		48148		9889		2381		0
		0		8069		51283		418382		1117343		1117343		418382		51283		8069		0
	0		27330

A305457 as a square array

0	0	0	0	0	0	0	0	0	0	0
0	3	5	18	61	209	702	2381	8069	27330
0	5	14	69	376	1891	9889	51283
0	18	69	661	5580	48148	418382
0	61	376	5580	79810	1117343
0	209	1891	48148	1117343
0	702	9889	418382
0	2381	51283
0	8069
0

A305457 as an upper right triangle

0	0	0	0	0	0	0	0	0	0	0
	0	3	5	18	61	209	702	2381	8069	27330
		0	5	14	69	376	1891	9889	51283
			0	18	69	661	5580	48148	418382
				0	61	376	5580	79810	1117343
					0	209	1891	48148	1117343
						0	702	9889	418382
							0	2381	51283
								0	8069
									0