A097883 - OEIS

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A097883 as a triangular array

												1
											2		3
										5		7		4
									6		8		9		11
								13		17		19		10		12
							14		15		16		21		23		25
						27		29		31		37		20		18		22
					26		28		24		30		33		41		35		39
				43		45		47		49		53		32		34		38		40
			36		44		46		48		50		51		55		59		61		57
		65		67		63		71		73		77		52		42		54		56		58
	62		64		68		74		60		69

A097883 as a square array

1	2	5	6	13	14	27	26	43	36	65	62
3	7	8	17	15	29	28	45	44	67	64
4	9	19	16	31	24	47	46	63	68
11	10	21	37	30	49	48	71	74
12	23	20	33	53	50	73	60
25	18	41	32	51	77	69
22	35	34	55	52
39	38	59	42
40	61	54
57	56
58

A097883 as an upper right triangle

1	2	5	6	13	14	27	26	43	36	65	62
	3	7	8	17	15	29	28	45	44	67	64
		4	9	19	16	31	24	47	46	63	68
			11	10	21	37	30	49	48	71	74
				12	23	20	33	53	50	73	60
					25	18	41	32	51	77	69
						22	35	34	55	52
							39	38	59	42
								40	61	54
									57	56
										58