A208872 - OEIS

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A208872 as a triangular array

									1
								2		2
							5		12		5
						15		136		143		15
					51		1798		6520		1979		51
				187		24472		307165		324682		28246		187
			715		334618		14493405		52947540		16205218		405481		715
		2795		4578580		683903931		8624977114		9130195864		808928836		5826959		2795
	11051		62655190

A208872 as a square array

1	2	5	15	51	187	715	2795	11051
2	12	136	1798	24472	334618	4578580	62655190
5	143	6520	307165	14493405	683903931
15	1979	324682	52947540	8624977114
51	28246	16205218	9130195864
187	405481	808928836
715	5826959
2795

A208872 as an upper right triangle

1	2	5	15	51	187	715	2795	11051
	2	12	136	1798	24472	334618	4578580	62655190
		5	143	6520	307165	14493405	683903931
			15	1979	324682	52947540	8624977114
				51	28246	16205218	9130195864
					187	405481	808928836
						715	5826959
							2795