A048201 - OEIS

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A048201 as a triangular array

											1
										2		3
									4		6		7
								5		9		11		12
							8		13		17		19		20
						10		18		23		27		29		30
					14		24		32		37		41		43		44
				15		29		39		47		52		56		58		59
			16		31		45		55		63		68		72		74		75
		21		37		52		66		76		84		89		93		95		96
	22		43		59		74		88		98		106		111

A048201 as a square array

1	2	4	5	8	10	14	15	16	21	22
3	6	9	13	18	24	29	31	37	43
7	11	17	23	32	39	45	52	59
12	19	27	37	47	55	66	74
20	29	41	52	63	76	88
30	43	56	68	84	98
44	58	72	89	106
59	74	93	111
75	95
96

A048201 as an upper right triangle

1	2	4	5	8	10	14	15	16	21	22
	3	6	9	13	18	24	29	31	37	43
		7	11	17	23	32	39	45	52	59
			12	19	27	37	47	55	66	74
				20	29	41	52	63	76	88
					30	43	56	68	84	98
						44	58	72	89	106
							59	74	93	111
								75	95
									96