A202864 - OEIS

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A202864 as a triangular array

									2
								3		2
							4		6		2
						5		12		42		2
					6		20		228		1346		2
				7		30		776		41852		223456		2
			8		42		2046		491892		80524892		202999208		2
		9		56		4578		3436102		5393851108		1720483641156		1049899768685		2
	10		72		9128		17232446		147978735402		1081958661341802

A202864 as a square array

2	3	4	5	6	7	8	9	10
2	6	12	20	30	42	56	72
2	42	228	776	2046	4578	9128
2	1346	41852	491892	3436102	17232446
2	223456	80524892	5393851108	147978735402
2	202999208	1720483641156	1081958661341802
2	1049899768685
2

A202864 as an upper right triangle

2	3	4	5	6	7	8	9	10
	2	6	12	20	30	42	56	72
		2	42	228	776	2046	4578	9128
			2	1346	41852	491892	3436102	17232446
				2	223456	80524892	5393851108	147978735402
					2	202999208	1720483641156	1081958661341802
						2	1049899768685
							2