A340986 - OEIS

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A340986 as a triangular array

										1
									1		0
								1		1		0
							1		2		3		0
						1		3		10		19		0
					1		4		21		92		211		0
				1		5		36		255		1354		3651		0
			1		6		55		544		4725		29252		90921		0
		1		7		78		995		12196		123903		873964		3081513		0
	1		8		105		1644		26215		377904		4368729		34555880		136407699		0

A340986 as a square array

1	1	1	1	1	1	1	1	1	1
0	1	2	3	4	5	6	7	8
0	3	10	21	36	55	78	105
0	19	92	255	544	995	1644
0	211	1354	4725	12196	26215
0	3651	29252	123903	377904
0	90921	873964	4368729
0	3081513	34555880
0	136407699
0

A340986 as an upper right triangle

1	1	1	1	1	1	1	1	1	1
	0	1	2	3	4	5	6	7	8
		0	3	10	21	36	55	78	105
			0	19	92	255	544	995	1644
				0	211	1354	4725	12196	26215
					0	3651	29252	123903	377904
						0	90921	873964	4368729
							0	3081513	34555880
								0	136407699
									0