A048720 - OEIS

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

A048720 as a triangular array

													0
												0		0
											0		1		0
										0		2		2		0
									0		3		4		3		0
								0		4		6		6		4		0
							0		5		8		5		8		5		0
						0		6		10		12		12		10		6		0
					0		7		12		15		16		15		12		7		0
				0		8		14		10		20		20		10		14		8		0
			0		9		16		9		24		17		24		9		16		9		0
		0		10		18		24		28		30		30		28		24		18		10		0
	0		11		20		27		32		27		20		27		32		27		20		11		0

A048720 as a square array

0	0	0	0	0	0	0	0	0	0	0	0	0
0	1	2	3	4	5	6	7	8	9	10	11
0	2	4	6	8	10	12	14	16	18	20
0	3	6	5	12	15	10	9	24	27
0	4	8	12	16	20	24	28	32
0	5	10	15	20	17	30	27
0	6	12	10	24	30	20
0	7	14	9	28	27
0	8	16	24	32
0	9	18	27
0	10	20
0	11
0

A048720 as an upper right triangle

0	0	0	0	0	0	0	0	0	0	0	0	0
	0	1	2	3	4	5	6	7	8	9	10	11
		0	2	4	6	8	10	12	14	16	18	20
			0	3	6	5	12	15	10	9	24	27
				0	4	8	12	16	20	24	28	32
					0	5	10	15	20	17	30	27
						0	6	12	10	24	30	20
							0	7	14	9	28	27
								0	8	16	24	32
									0	9	18	27
										0	10	20
											0	11
												0