A196856 - OEIS

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A196856 as a triangular array

										1
									2		2
								4		11		4
							6		38		38		6
						12		136		206		136		12
					22		496		1370		1370		496		22
				40		1792		8767		16876		8767		1792		40
			74		6440		56470		199125		199125		56470		6440		74
		136		23306		363685		2369631		4326720		2369631		363685		23306		136
	250		84180

A196856 as a square array

1	2	4	6	12	22	40	74	136	250
2	11	38	136	496	1792	6440	23306	84180
4	38	206	1370	8767	56470	363685
6	136	1370	16876	199125	2369631
12	496	8767	199125	4326720
22	1792	56470	2369631
40	6440	363685
74	23306
136

A196856 as an upper right triangle

1	2	4	6	12	22	40	74	136	250
	2	11	38	136	496	1792	6440	23306	84180
		4	38	206	1370	8767	56470	363685
			6	136	1370	16876	199125	2369631
				12	496	8767	199125	4326720
					22	1792	56470	2369631
						40	6440	363685
							74	23306
								136