A210880 - OEIS

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A210880 as a triangular array

												1
											2		1
										3		5		2
									4		7		7		3
								5		9		10		12		5
							6		11		13		17		19		8
						7		13		16		22		27		31		13
					8		15		19		27		35		44		50		21
				9		17		22		32		43		57		71		81		34
			10		19		25		37		51		70		92		115		131		55
		11		21		28		42		59		83		113		149		186		212		89
	12		23		31		47

A210880 as a square array

1	2	3	4	5	6	7	8	9	10	11	12
1	5	7	9	11	13	15	17	19	21	23
2	7	10	13	16	19	22	25	28	31
3	12	17	22	27	32	37	42	47
5	19	27	35	43	51	59
8	31	44	57	70	83
13	50	71	92	113
21	81	115	149
34	131	186
55	212
89

A210880 as an upper right triangle

1	2	3	4	5	6	7	8	9	10	11	12
	1	5	7	9	11	13	15	17	19	21	23
		2	7	10	13	16	19	22	25	28	31
			3	12	17	22	27	32	37	42	47
				5	19	27	35	43	51	59
					8	31	44	57	70	83
						13	50	71	92	113
							21	81	115	149
								34	131	186
									55	212
										89