A271776 - OEIS

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A271776 as a triangular array

											1
										1		1
									2		2		1
								6		5		3		1
							20		18		9		4		1
						70		70		37		14		5		1
					252		280		162		64		20		6		1
				924		1134		720		309		100		27		7		1
			3432		4620		3206		1500		525		146		35		8		1
		12870		18876		14238		7238		2751		825		203		44		9		1
	48620		77220		62964		34608		14240		4626		1225		272		54		10		1

A271776 as a square array

1	1	2	6	20	70	252	924	3432	12870	48620
1	2	5	18	70	280	1134	4620	18876	77220
1	3	9	37	162	720	3206	14238	62964
1	4	14	64	309	1500	7238	34608
1	5	20	100	525	2751	14240
1	6	27	146	825	4626
1	7	35	203	1225
1	8	44	272
1	9	54
1	10
1

A271776 as an upper right triangle

1	1	2	6	20	70	252	924	3432	12870	48620
	1	2	5	18	70	280	1134	4620	18876	77220
		1	3	9	37	162	720	3206	14238	62964
			1	4	14	64	309	1500	7238	34608
				1	5	20	100	525	2751	14240
					1	6	27	146	825	4626
						1	7	35	203	1225
							1	8	44	272
								1	9	54
									1	10
										1