A281293 - OEIS

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A281293 as a triangular array

											1
										0		3
									0		3		6
								0		3		15		10
							0		3		27		45		15
						0		3		42		126		105		21
					0		3		60		280		420		210		28
				0		3		81		540		1260		1134		378		36
			0		3		105		945		3150		4410		2646		630		45
		0		3		132		1540		6930		13860		12936		5544		990		55
	0		3		162		2376		13860		37422		49896		33264		10692		1485		66

A281293 as a square array

1	0	0	0	0	0	0	0	0	0	0
3	3	3	3	3	3	3	3	3	3
6	15	27	42	60	81	105	132	162
10	45	126	280	540	945	1540	2376
15	105	420	1260	3150	6930	13860
21	210	1134	4410	13860	37422
28	378	2646	12936	49896
36	630	5544	33264
45	990	10692
55	1485
66

A281293 as an upper right triangle

1	0	0	0	0	0	0	0	0	0	0
	3	3	3	3	3	3	3	3	3	3
		6	15	27	42	60	81	105	132	162
			10	45	126	280	540	945	1540	2376
				15	105	420	1260	3150	6930	13860
					21	210	1134	4410	13860	37422
						28	378	2646	12936	49896
							36	630	5544	33264
								45	990	10692
									55	1485
										66