A226870 - OEIS

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A226870 as a triangular array

									2
								4		4
							7		13		7
						11		37		37		11
					16		91		187		91		16
				22		199		792		792		199		22
			29		397		2866		6195		2866		397		29
		37		736		9136		41222		41222		9136		736		37
	46		1285		26267		235528		523701		235528		26267		1285		46
56		2134		69311		1179663		5692900

A226870 as a square array

2	4	7	11	16	22	29	37	46	56
4	13	37	91	199	397	736	1285	2134
7	37	187	792	2866	9136	26267	69311
11	91	792	6195	41222	235528	1179663
16	199	2866	41222	523701	5692900
22	397	9136	235528
29	736	26267
37	1285
46

A226870 as an upper right triangle

2	4	7	11	16	22	29	37	46	56
	4	13	37	91	199	397	736	1285	2134
		7	37	187	792	2866	9136	26267	69311
			11	91	792	6195	41222	235528	1179663
				16	199	2866	41222	523701	5692900
					22	397	9136	235528
						29	736	26267
							37	1285
								46