A124847 - OEIS

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A124847 as a triangular array

											1
										1		3
									1		6		6
								1		9		18		10
							1		12		36		40		15
						1		15		60		100		75		21
					1		18		90		200		225		126		28
				1		21		126		350		525		441		196		36
			1		24		168		560		1050		1176		784		288		45
		1		27		216		840		1890		2646		2352		1296		405		55
	1		30		270		1200		3150		5292		5880

A124847 as a square array

1	1	1	1	1	1	1	1	1	1	1
3	6	9	12	15	18	21	24	27	30
6	18	36	60	90	126	168	216	270
10	40	100	200	350	560	840	1200
15	75	225	525	1050	1890	3150
21	126	441	1176	2646	5292
28	196	784	2352	5880
36	288	1296
45	405
55

A124847 as an upper right triangle

1	1	1	1	1	1	1	1	1	1	1
	3	6	9	12	15	18	21	24	27	30
		6	18	36	60	90	126	168	216	270
			10	40	100	200	350	560	840	1200
				15	75	225	525	1050	1890	3150
					21	126	441	1176	2646	5292
						28	196	784	2352	5880
							36	288	1296
								45	405
									55