A194061 - OEIS

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A194061 as a triangular array

											1
										2		3
									4		5		8
								6		7		11		15
							9		10		14		19		24
						12		13		18		23		29		35
					16		17		22		28		34		41		48
				20		21		27		33		40		47		55		63
			25		26		32		39		46		54		62		71		80
		30		31		38		45		53		61		70		79		89		99
	36		37		44		52		60		69		78		88		98		109		120

A194061 as a square array

1	2	4	6	9	12	16	20	25	30	36
3	5	7	10	13	17	21	26	31	37
8	11	14	18	22	27	32	38	44
15	19	23	28	33	39	45	52
24	29	34	40	46	53	60
35	41	47	54	61	69
48	55	62	70	78
63	71	79	88
80	89	98
99	109
120

A194061 as an upper right triangle

1	2	4	6	9	12	16	20	25	30	36
	3	5	7	10	13	17	21	26	31	37
		8	11	14	18	22	27	32	38	44
			15	19	23	28	33	39	45	52
				24	29	34	40	46	53	60
					35	41	47	54	61	69
						48	55	62	70	78
							63	71	79	88
								80	89	98
									99	109
										120