A252820 - OEIS

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A252820 as a triangular array

										1
									2		2
								4		6		4
							7		17		17		7
						11		40		63		40		11
					16		81		187		187		81		16
				22		147		468		684		468		147		22
			29		246		1032		2078		2078		1032		246		29
		37		387		2067		5490		7564		5490		2067		387		37
	46		580		3840		13015		23664		23664		13015		3840		580		46
56		836		6716

A252820 as a square array

1	2	4	7	11	16	22	29	37	46	56
2	6	17	40	81	147	246	387	580	836
4	17	63	187	468	1032	2067	3840	6716
7	40	187	684	2078	5490	13015
11	81	468	2078	7564	23664
16	147	1032	5490	23664
22	246	2067	13015
29	387	3840
37	580
46

A252820 as an upper right triangle

1	2	4	7	11	16	22	29	37	46	56
	2	6	17	40	81	147	246	387	580	836
		4	17	63	187	468	1032	2067	3840	6716
			7	40	187	684	2078	5490	13015
				11	81	468	2078	7564	23664
					16	147	1032	5490	23664
						22	246	2067	13015
							29	387	3840
								37	580
									46