A185957 - OEIS

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A185957 as a triangular array

											1
										3		3
									6		10		6
								10		21		21		10
							15		36		46		36		15
						21		55		81		81		55		21
					28		78		126		146		126		78		28
				36		105		181		231		231		181		105		36
			45		136		246		336		371		336		246		136		45
		55		171		321		461		546		546		461		321		171		55
	66		210		406		606		756		812		756

A185957 as a square array

1	3	6	10	15	21	28	36	45	55	66
3	10	21	36	55	78	105	136	171	210
6	21	46	81	126	181	246	321	406
10	36	81	146	231	336	461	606
15	55	126	231	371	546	756
21	78	181	336	546	812
28	105	246	461	756
36	136	321
45	171
55

A185957 as an upper right triangle

1	3	6	10	15	21	28	36	45	55	66
	3	10	21	36	55	78	105	136	171	210
		6	21	46	81	126	181	246	321	406
			10	36	81	146	231	336	461	606
				15	55	126	231	371	546	756
					21	78	181	336	546	812
						28	105	246	461	756
							36	136	321
								45	171
									55