A355721 - OEIS

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A355721 as a triangular array

									1
								1		2
							1		2		6
						1		2		10		26
					1		2		14		74		158
				1		2		18		138		706		1282
			1		2		22		218		1686		8162		13158
		1		2		26		314		3194		24162		110410		163354
	1		2		30		426		5326		53890		394254		1708394		2374078
1		2		34		554		8178		102722		1019250		7191018		29752066		39456386

A355721 as a square array

1	1	1	1	1	1	1	1	1	1
2	2	2	2	2	2	2	2	2
6	10	14	18	22	26	30	34
26	74	138	218	314	426	554
158	706	1686	3194	5326	8178
1282	8162	24162	53890	102722
13158	110410	394254	1019250
163354	1708394	7191018
2374078	29752066
39456386

A355721 as an upper right triangle

1	1	1	1	1	1	1	1	1	1
	2	2	2	2	2	2	2	2	2
		6	10	14	18	22	26	30	34
			26	74	138	218	314	426	554
				158	706	1686	3194	5326	8178
					1282	8162	24162	53890	102722
						13158	110410	394254	1019250
							163354	1708394	7191018
								2374078	29752066
									39456386