A221356 - OEIS

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A221356 as a triangular array

													1
												1		2
											3		4		3
										4		6		4		4
									4		8		9		8		5
								6		10		12		12		9		6
							7		12		12		12		15		12		7
						7		14		18		20		20		18		12		8
					9		16		21		24		24		24		21		16		9
				10		18		22		28		30		30		28		24		17		10
			10		20		27		32		35		30		31		32		27		20		11
		12		22		30		32		39		42		42		40		32		30		20		12
	13		24

A221356 as a square array

1	1	3	4	4	6	7	7	9	10	10	12	13
2	4	6	8	10	12	14	16	18	20	22	24
3	4	9	12	12	18	21	22	27	30
4	8	12	12	20	24	28	32	32
5	9	15	20	24	30	35	39
6	12	18	24	30	30	42
7	12	21	28	31	42
8	16	24	32	40
9	17	27	32
10	20	30
11	20
12

A221356 as an upper right triangle

1	1	3	4	4	6	7	7	9	10	10	12	13
	2	4	6	8	10	12	14	16	18	20	22	24
		3	4	9	12	12	18	21	22	27	30
			4	8	12	12	20	24	28	32	32
				5	9	15	20	24	30	35	39
					6	12	18	24	30	30	42
						7	12	21	28	31	42
							8	16	24	32	40
								9	17	27	32
									10	20	30
										11	20
											12