A318958 - OEIS

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A318958 as a triangular array

												0
											0		0
										0		-1		-1
									0		1		0		0
								0		0		1		0		0
							0		2		2		3		2		2
						0		1		3		3		4		3		3
					0		3		4		6		6		7		6		6
				0		2		5		6		8		8		9		8		8
			0		4		6		9		10		12		12		13		12		12
		0		3		7		9		12		13		15		15		16		15		15
	0		5		8		12		14		17		18		20		20		21		20		20

A318958 as a square array

0	0	0	0	0	0	0	0	0	0	0	0
0	-1	1	0	2	1	3	2	4	3	5
-1	0	1	2	3	4	5	6	7	8
0	0	3	3	6	6	9	9	12
0	2	4	6	8	10	12	14
2	3	7	8	12	13	17
3	6	9	12	15	18
6	8	13	15	20
8	12	16	20
12	15	21
15	20
20

A318958 as an upper right triangle

0	0	0	0	0	0	0	0	0	0	0	0
	0	-1	1	0	2	1	3	2	4	3	5
		-1	0	1	2	3	4	5	6	7	8
			0	0	3	3	6	6	9	9	12
				0	2	4	6	8	10	12	14
					2	3	7	8	12	13	17
						3	6	9	12	15	18
							6	8	13	15	20
								8	12	16	20
									12	15	21
										15	20
											20