A283961 - OEIS

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A283961 as a triangular array

											1
										2		4
									3		6		10
								5		8		13		18
							7		11		16		22		29
						9		14		20		26		34		43
					12		17		24		31		39		49		59
				15		21		28		36		45		55		66		78
			19		25		33		41		51		62		73		86		99
		23		30		38		47		57		69		81		94		108		123
	27		35		44		53		64		76		89		103		117		133

A283961 as a square array

1	2	3	5	7	9	12	15	19	23	27
4	6	8	11	14	17	21	25	30	35
10	13	16	20	24	28	33	38	44
18	22	26	31	36	41	47	53
29	34	39	45	51	57	64
43	49	55	62	69	76
59	66	73	81	89
78	86	94	103
99	108	117
123	133

A283961 as an upper right triangle

1	2	3	5	7	9	12	15	19	23	27
	4	6	8	11	14	17	21	25	30	35
		10	13	16	20	24	28	33	38	44
			18	22	26	31	36	41	47	53
				29	34	39	45	51	57	64
					43	49	55	62	69	76
						59	66	73	81	89
							78	86	94	103
								99	108	117
									123	133