A272616 - OEIS

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A272616 as a triangular array

											1
										2		3
									4		5		8
								6		7		11		15
							9		10		14		19		32
						12		13		18		23		37		43
					16		17		22		27		42		49		68
				20		21		26		31		48		55		75		83
			24		25		30		36		54		61		82		91		116
		28		29		35		41		60		67		90		99		125		171
	33		34		40		47		66		74		98		107		134		181

A272616 as a square array

1	2	4	6	9	12	16	20	24	28	33
3	5	7	10	13	17	21	25	29	34
8	11	14	18	22	26	30	35	40
15	19	23	27	31	36	41	47
32	37	42	48	54	60	66
43	49	55	61	67	74
68	75	82	90	98
83	91	99	107
116	125	134
171	181

A272616 as an upper right triangle

1	2	4	6	9	12	16	20	24	28	33
	3	5	7	10	13	17	21	25	29	34
		8	11	14	18	22	26	30	35	40
			15	19	23	27	31	36	41	47
				32	37	42	48	54	60	66
					43	49	55	61	67	74
						68	75	82	90	98
							83	91	99	107
								116	125	134
									171	181