A128440 - OEIS

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A128440 as a triangular array

											1
										3		2
									4		5		4
								6		7		8		6
							8		10		12		13		11
						9		13		16		20		22		17
					11		15		21		27		33		35		29
				12		18		25		34		44		53		58		46
			14		20		29		41		55		71		87		93		76
		16		23		33		47		66		89		116		140		152		122
	17		26		38		54		77		107		145		187		228		245		199

A128440 as a square array

1	3	4	6	8	9	11	12	14	16	17
2	5	7	10	13	15	18	20	23	26
4	8	12	16	21	25	29	33	38
6	13	20	27	34	41	47	54
11	22	33	44	55	66	77
17	35	53	71	89	107
29	58	87	116	145
46	93	140	187
76	152	228
122	245
199

A128440 as an upper right triangle

1	3	4	6	8	9	11	12	14	16	17
	2	5	7	10	13	15	18	20	23	26
		4	8	12	16	21	25	29	33	38
			6	13	20	27	34	41	47	54
				11	22	33	44	55	66	77
					17	35	53	71	89	107
						29	58	87	116	145
							46	93	140	187
								76	152	228
									122	245
										199