A222821 - OEIS

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A222821 as a triangular array

									2
								2		8
							2		12		50
						2		16		122		452
					2		20		218		2052		5682
				2		24		344		5584		54182		96608
			2		28		488		12476		248442		2236302		2185738
		2		32		668		23568		855192		20394466		145121216		65108492
	2		36		860		41668		2319872		126252320

A222821 as a square array

2	2	2	2	2	2	2	2	2
8	12	16	20	24	28	32	36
50	122	218	344	488	668	860
452	2052	5584	12476	23568	41668
5682	54182	248442	855192	2319872
96608	2236302	20394466	126252320
2185738	145121216
65108492

A222821 as an upper right triangle

2	2	2	2	2	2	2	2	2
	8	12	16	20	24	28	32	36
		50	122	218	344	488	668	860
			452	2052	5584	12476	23568	41668
				5682	54182	248442	855192	2319872
					96608	2236302	20394466	126252320
						2185738	145121216
							65108492