A077264 - OEIS

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A077264 as a triangular array

													0
												0		1
											1		2		2
										0		3		4		3
									1		3		5		6		4
								2		4		6		7		8		5
							0		5		7		9		9		10		6
						1		4		8		10		12		11		12		7
					2		5		8		11		13		15		13		14		8
				3		6		9		12		14		16		18		15		16		9
			0		7		10		13		16		17		19		21		17		18		10
		1		5		11		14		17		20		20		22		24		19		20		11
	2		6		10		15		18		21

A077264 as a square array

0	0	1	0	1	2	0	1	2	3	0	1	2
1	2	3	3	4	5	4	5	6	7	5	6
2	4	5	6	7	8	8	9	10	11	10
3	6	7	9	10	11	12	13	14	15
4	8	9	12	13	14	16	17	18
5	10	11	15	16	17	20	21
6	12	13	18	19	20
7	14	15	21	22
8	16	17	24
9	18	19
10	20
11

A077264 as an upper right triangle

0	0	1	0	1	2	0	1	2	3	0	1	2
	1	2	3	3	4	5	4	5	6	7	5	6
		2	4	5	6	7	8	8	9	10	11	10
			3	6	7	9	10	11	12	13	14	15
				4	8	9	12	13	14	16	17	18
					5	10	11	15	16	17	20	21
						6	12	13	18	19	20
							7	14	15	21	22
								8	16	17	24
									9	18	19
										10	20
											11