A129258 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A129258 as a triangular array

												1
											2		3
										4		6		5
									7		12		10		8
								9		21		20		16		11
							13		27		35		32		22		14
						15		39		45		56		44		28		17
					18		45		65		72		77		56		34		19
				23		54		75		104		99		98		68		38		24
			25		69		90		120		143		126		119		76		48		26
		29		75		115		144		165		182		153		133		96		52		30
	31		87		125

A129258 as a square array

1	2	4	7	9	13	15	18	23	25	29	31
3	6	12	21	27	39	45	54	69	75	87
5	10	20	35	45	65	75	90	115	125
8	16	32	56	72	104	120	144
11	22	44	77	99	143	165
14	28	56	98	126	182
17	34	68	119	153
19	38	76	133
24	48	96
26	52
30

A129258 as an upper right triangle

1	2	4	7	9	13	15	18	23	25	29	31
	3	6	12	21	27	39	45	54	69	75	87
		5	10	20	35	45	65	75	90	115	125
			8	16	32	56	72	104	120	144
				11	22	44	77	99	143	165
					14	28	56	98	126	182
						17	34	68	119	153
							19	38	76	133
								24	48	96
									26	52
										30