A219686 - OEIS

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A219686 as a triangular array

											3
										3		3
									6		4		6
								10		8		9		10
							15		14		31		19		15
						21		22		87		99		35		21
					28		32		208		427		269		60		28
				36		44		452		1531		1688		655		98		36
			45		58		922		5031		8964		5726		1506		154		45
		55		74		1799		15763		44736		44816		18486		3356		234		55
	66		92		3394		47784

A219686 as a square array

3	3	6	10	15	21	28	36	45	55	66
3	4	8	14	22	32	44	58	74	92
6	9	31	87	208	452	922	1799	3394
10	19	99	427	1531	5031	15763	47784
15	35	269	1688	8964	44736
21	60	655	5726	44816
28	98	1506	18486
36	154	3356
45	234
55

A219686 as an upper right triangle

3	3	6	10	15	21	28	36	45	55	66
	3	4	8	14	22	32	44	58	74	92
		6	9	31	87	208	452	922	1799	3394
			10	19	99	427	1531	5031	15763	47784
				15	35	269	1688	8964	44736
					21	60	655	5726	44816
						28	98	1506	18486
							36	154	3356
								45	234
									55