A219627 - OEIS

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A219627 as a triangular array

										3
									3		6
								6		11		10
							10		24		27		15
						15		54		130		56		21
					21		103		582		566		105		28
				28		178		2109		5072		2134		183		36
			36		290		6637		37215		37787		7259		301		45
		45		453		19166		231634		556742		248473		22715		472		55
	55		684		51491		1278800		6834071		7236952

A219627 as a square array

3	3	6	10	15	21	28	36	45	55
6	11	24	54	103	178	290	453	684
10	27	130	582	2109	6637	19166	51491
15	56	566	5072	37215	231634	1278800
21	105	2134	37787	556742	6834071
28	183	7259	248473	7236952
36	301	22715
45	472
55

A219627 as an upper right triangle

3	3	6	10	15	21	28	36	45	55
	6	11	24	54	103	178	290	453	684
		10	27	130	582	2109	6637	19166	51491
			15	56	566	5072	37215	231634	1278800
				21	105	2134	37787	556742	6834071
					28	183	7259	248473	7236952
						36	301	22715
							45	472
								55