A193896 - OEIS

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A193896 as a triangular array

											1
										1		2
									3		6		6
								6		12		15		12
							10		20		27		28		20
						15		30		42		48		45		30
					21		42		60		72		75		66		42
				28		56		81		100		110		108		91		56
			36		72		105		132		150		156		147		120		72
		45		90		132		168		195		210		210		192		153		90
	55		110		162		208		245		270		280

A193896 as a square array

1	1	3	6	10	15	21	28	36	45	55
2	6	12	20	30	42	56	72	90	110
6	15	27	42	60	81	105	132	162
12	28	48	72	100	132	168	208
20	45	75	110	150	195	245
30	66	108	156	210	270
42	91	147	210	280
56	120	192
72	153
90

A193896 as an upper right triangle

1	1	3	6	10	15	21	28	36	45	55
	2	6	12	20	30	42	56	72	90	110
		6	15	27	42	60	81	105	132	162
			12	28	48	72	100	132	168	208
				20	45	75	110	150	195	245
					30	66	108	156	210	270
						42	91	147	210	280
							56	120	192
								72	153
									90