A278734 - OEIS

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A278734 as a triangular array

								0
							6		6
						40		152		40
					155		1947		1947		155
				456		17352		58904		17352		456
			1128		121520		1410818		1410818		121520		1128
		2472		712406		28637916		99992428		28637916		712406		2472
	4950		3633649		506031118		6410559865		6410559865		506031118

A278734 as a square array

0	6	40	155	456	1128	2472	4950
6	152	1947	17352	121520	712406	3633649
40	1947	58904	1410818	28637916	506031118
155	17352	1410818	99992428	6410559865
456	121520	28637916	6410559865
1128	712406	506031118
2472

A278734 as an upper right triangle

0	6	40	155	456	1128	2472	4950
	6	152	1947	17352	121520	712406	3633649
		40	1947	58904	1410818	28637916	506031118
			155	17352	1410818	99992428	6410559865
				456	121520	28637916	6410559865
					1128	712406	506031118
						2472