A344646 - OEIS

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A344646 as a triangular array

												0
											1		1
										2		3		2
									4		5		5		4
								6		7		8		7		6
							9		10		11		11		10		9
						12		13		14		15		14		13		12
					16		17		18		19		19		18		17		16
				20		21		22		23		24		23		22		21		20
			25		26		27		28		29		29		28		27		26		25
		30		31		32		33		34		35		34		33		32		31		30
	36		37		38		39		40		41		41		40		39		38		37		36

A344646 as a square array

0	1	2	4	6	9	12	16	20	25	30	36
1	3	5	7	10	13	17	21	26	31	37
2	5	8	11	14	18	22	27	32	38
4	7	11	15	19	23	28	33	39
6	10	14	19	24	29	34	40
9	13	18	23	29	35	41
12	17	22	28	34	41
16	21	27	33	40
20	26	32	39
25	31	38
30	37
36

A344646 as an upper right triangle

0	1	2	4	6	9	12	16	20	25	30	36
	1	3	5	7	10	13	17	21	26	31	37
		2	5	8	11	14	18	22	27	32	38
			4	7	11	15	19	23	28	33	39
				6	10	14	19	24	29	34	40
					9	13	18	23	29	35	41
						12	17	22	28	34	41
							16	21	27	33	40
								20	26	32	39
									25	31	38
										30	37
											36