A297628 - OEIS

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A297628 as a triangular array

									1
								1		1
							1		2		2
						1		5		7		7
					1		20		34		41		41
				1		137		253		335		376		376
			1		1478		2818		3905		4657		5033		5033
		1		22925		44371		62999		77722		87788		92821		92821
	1		481448		939970		1354121		1705273		1978703		2164345		2257166		2257166

A297628 as a square array

1	1	1	1	1	1	1	1	1
1	2	5	20	137	1478	22925	481448
2	7	34	253	2818	44371	939970
7	41	335	3905	62999	1354121
41	376	4657	77722	1705273
376	5033	87788	1978703
5033	92821	2164345
92821	2257166
2257166

A297628 as an upper right triangle

1	1	1	1	1	1	1	1	1
	1	2	5	20	137	1478	22925	481448
		2	7	34	253	2818	44371	939970
			7	41	335	3905	62999	1354121
				41	376	4657	77722	1705273
					376	5033	87788	1978703
						5033	92821	2164345
							92821	2257166
								2257166