A221918 - OEIS

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

A221918 as a triangular array

												1
											2		1
										3		6		3
									4		4		12		2
								5		10		15		20		5
							6		3		2		12		30		3
						7		14		21		28		35		42		7
					8		8		24		8		40		24		56		4
				9		18		9		36		45		18		63		72		9
			10		5		30		20		10		15		70		40		90		5
		11		22		33		44		55		66		77		88		99		110		11
	12		12		12		3		60		4		84		24		36		60		132		6

A221918 as a square array

1	2	3	4	5	6	7	8	9	10	11	12
1	6	4	10	3	14	8	18	5	22	12
3	12	15	2	21	24	9	30	33	12
2	20	12	28	8	36	20	44	3
5	30	35	40	45	10	55	60
3	42	24	18	15	66	4
7	56	63	70	77	84
4	72	40	88	24
9	90	99	36
5	110	60
11	132
6

A221918 as an upper right triangle

1	2	3	4	5	6	7	8	9	10	11	12
	1	6	4	10	3	14	8	18	5	22	12
		3	12	15	2	21	24	9	30	33	12
			2	20	12	28	8	36	20	44	3
				5	30	35	40	45	10	55	60
					3	42	24	18	15	66	4
						7	56	63	70	77	84
							4	72	40	88	24
								9	90	99	36
									5	110	60
										11	132
											6