A128282 - OEIS

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A128282 as a triangular array

												1
											2		2
										3		4		3
									5		6		6		5
								7		8		9		8		7
							10		11		12		12		11		10
						13		14		15		16		15		14		13
					17		18		19		20		20		19		18		17
				21		22		23		24		25		24		23		22		21
			26		27		28		29		30		30		29		28		27		26
		31		32		33		34		35		36		35		34		33		32		31
	37		38		39		40		41		42		42		41		40		39		38		37

A128282 as a square array

1	2	3	5	7	10	13	17	21	26	31	37
2	4	6	8	11	14	18	22	27	32	38
3	6	9	12	15	19	23	28	33	39
5	8	12	16	20	24	29	34	40
7	11	15	20	25	30	35	41
10	14	19	24	30	36	42
13	18	23	29	35	42
17	22	28	34	41
21	27	33	40
26	32	39
31	38
37

A128282 as an upper right triangle

1	2	3	5	7	10	13	17	21	26	31	37
	2	4	6	8	11	14	18	22	27	32	38
		3	6	9	12	15	19	23	28	33	39
			5	8	12	16	20	24	29	34	40
				7	11	15	20	25	30	35	41
					10	14	19	24	30	36	42
						13	18	23	29	35	42
							17	22	28	34	41
								21	27	33	40
									26	32	39
										31	38
											37