A050157 - OEIS

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A050157 as a triangular array

									1
								1		2
							2		5		6
						5		14		19		20
					14		42		62		69		70
				42		132		207		242		251		252
			132		429		704		858		912		923		924
		429		1430		2431		3068		3341		3418		3431		3432
	1430		4862		8502		11050		12310		12750		12854		12869		12870

A050157 as a square array

1	1	2	5	14	42	132	429	1430
2	5	14	42	132	429	1430	4862
6	19	62	207	704	2431	8502
20	69	242	858	3068	11050
70	251	912	3341	12310
252	923	3418	12750
924	3431	12854
3432	12869
12870

A050157 as an upper right triangle

1	1	2	5	14	42	132	429	1430
	2	5	14	42	132	429	1430	4862
		6	19	62	207	704	2431	8502
			20	69	242	858	3068	11050
				70	251	912	3341	12310
					252	923	3418	12750
						924	3431	12854
							3432	12869
								12870