A108644 - OEIS

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A108644 as a triangular array

											1
										3		2
									7		4		5
								13		8		6		10
							21		14		9		11		17
						31		22		15		12		18		26
					43		32		23		16		19		27		37
				57		44		33		24		20		28		38		50
			73		58		45		34		25		29		39		51		65
		91		74		59		46		35		30		40		52		66		82
	111		92		75		60		47		36		41		53		67		83		101

A108644 as a square array

1	3	7	13	21	31	43	57	73	91	111
2	4	8	14	22	32	44	58	74	92
5	6	9	15	23	33	45	59	75
10	11	12	16	24	34	46	60
17	18	19	20	25	35	47
26	27	28	29	30	36
37	38	39	40	41
50	51	52	53
65	66	67
82	83
101

A108644 as an upper right triangle

1	3	7	13	21	31	43	57	73	91	111
	2	4	8	14	22	32	44	58	74	92
		5	6	9	15	23	33	45	59	75
			10	11	12	16	24	34	46	60
				17	18	19	20	25	35	47
					26	27	28	29	30	36
						37	38	39	40	41
							50	51	52	53
								65	66	67
									82	83
										101