A145890 - OEIS

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A145890 as a triangular array

										1
									1		2
								2		2		6
							5		4		6		20
						14		10		12		20		70
					42		28		30		40		70		252
				132		84		84		100		140		252		924
			429		264		252		280		350		504		924		3432
		1430		858		792		840		980		1260		1848		3432		12870
	4862		2860		2574		2640		2940		3528		4620		6864		12870		48620

A145890 as a square array

1	1	2	5	14	42	132	429	1430	4862
2	2	4	10	28	84	264	858	2860
6	6	12	30	84	252	792	2574
20	20	40	100	280	840	2640
70	70	140	350	980	2940
252	252	504	1260	3528
924	924	1848	4620
3432	3432	6864
12870	12870
48620

A145890 as an upper right triangle

1	1	2	5	14	42	132	429	1430	4862
	2	2	4	10	28	84	264	858	2860
		6	6	12	30	84	252	792	2574
			20	20	40	100	280	840	2640
				70	70	140	350	980	2940
					252	252	504	1260	3528
						924	924	1848	4620
							3432	3432	6864
								12870	12870
									48620