A223256 - OEIS

(Translated by https://www.hiragana.jp/)
A223256 - OEIS

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A223256 as a triangular array

										1
									1		1
								1		3		1
							1		11		11		1
						1		25		61		25		1
					1		137		379		379		137		1
				1		49		667		3023		667		49		1
			1		363		529		8731		8731		529		363		1
		1		761		46847		62023		270961		62023		46847		761		1
	1		7129		51011		9161		28525		28525		9161		51011		7129		1

A223256 as a square array

1	1	1	1	1	1	1	1	1	1
1	3	11	25	137	49	363	761	7129
1	11	61	379	667	529	46847	51011
1	25	379	3023	8731	62023	9161
1	137	667	8731	270961	28525
1	49	529	62023	28525
1	363	46847	9161
1	761	51011
1	7129
1

A223256 as an upper right triangle

1	1	1	1	1	1	1	1	1	1
	1	3	11	25	137	49	363	761	7129
		1	11	61	379	667	529	46847	51011
			1	25	379	3023	8731	62023	9161
				1	137	667	8731	270961	28525
					1	49	529	62023	28525
						1	363	46847	9161
							1	761	51011
								1	7129
									1