A216953 - OEIS

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A216953 as a triangular array

														2
													2		2
												2		0		6
											2		2		0		12
										2		0		0		0		30
									2		2		6		0		0		54
								2		0		0		0		0		0		126
							2		2		0		12		0		0		0		240
						2		0		6		0		0		0		0		0		504
					2		2		0		0		30		0		0		0		0		990
				2		0		0		0		0		0		0		0		0		0		2046
			2		2		6		12		0		54		0		0		0		0		0		4020
		2		0		0		0		0		0		0		0		0		0		0		0		8190
	2		2		0		0		0		0		126		0		0		0		0		0		0		16254

A216953 as a square array

2	2	2	2	2	2	2	2	2	2	2	2	2	2
2	0	2	0	2	0	2	0	2	0	2	0	2
6	0	0	6	0	0	6	0	0	6	0	0
12	0	0	0	12	0	0	0	12	0	0
30	0	0	0	0	30	0	0	0	0
54	0	0	0	0	0	54	0	0
126	0	0	0	0	0	0	126
240	0	0	0	0	0	0
504	0	0	0	0	0
990	0	0	0	0
2046	0	0	0
4020	0	0
8190	0
16254

A216953 as an upper right triangle

2	2	2	2	2	2	2	2	2	2	2	2	2	2
	2	0	2	0	2	0	2	0	2	0	2	0	2
		6	0	0	6	0	0	6	0	0	6	0	0
			12	0	0	0	12	0	0	0	12	0	0
				30	0	0	0	0	30	0	0	0	0
					54	0	0	0	0	0	54	0	0
						126	0	0	0	0	0	0	126
							240	0	0	0	0	0	0
								504	0	0	0	0	0
									990	0	0	0	0
										2046	0	0	0
											4020	0	0
												8190	0
													16254