A143381 - OEIS

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A143381 as a triangular array

									0
								2		0
							6		2		0
						14		30		2		0
					78		230		174		2		0
				230		14094		4834		1092		2		0
			1902		187106		3785126		114442		7188		2		0
		6902		26185806		250560122		1225289412		2908990		48852		2		0
	76110		557115782		682502468094		423419180642

A143381 as a square array

0	2	6	14	78	230	1902	6902	76110
0	2	30	230	14094	187106	26185806	557115782
0	2	174	4834	3785126	250560122	682502468094
0	2	1092	114442	1225289412	423419180642
0	2	7188	2908990
0	2	48852
0	2
0

A143381 as an upper right triangle

0	2	6	14	78	230	1902	6902	76110
	0	2	30	230	14094	187106	26185806	557115782
		0	2	174	4834	3785126	250560122	682502468094
			0	2	1092	114442	1225289412	423419180642
				0	2	7188	2908990
					0	2	48852
						0	2
							0