A254539 - OEIS

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A254539 as a triangular array

											1
										2		1
									2		3		1
								3		5		8		2
							3		10		15		20		4
						4		11		40		45		50		6
					5		20		49		160		135		126		11
				6		28		105		222		670		421		329		20
			6		37		163		576		1087		3001		1466		956		33
		7		41		253		1026		3383		5604		13503		5403		2897		62
	7		54		307		1849		6814		20393		29038		60408

A254539 as a square array

1	2	2	3	3	4	5	6	6	7	7
1	3	5	10	11	20	28	37	41	54
1	8	15	40	49	105	163	253	307
2	20	45	160	222	576	1026	1849
4	50	135	670	1087	3383	6814
6	126	421	3001	5604	20393
11	329	1466	13503	29038
20	956	5403	60408
33	2897
62

A254539 as an upper right triangle

1	2	2	3	3	4	5	6	6	7	7
	1	3	5	10	11	20	28	37	41	54
		1	8	15	40	49	105	163	253	307
			2	20	45	160	222	576	1026	1849
				4	50	135	670	1087	3383	6814
					6	126	421	3001	5604	20393
						11	329	1466	13503	29038
							20	956	5403	60408
								33	2897
									62