A285733 - OEIS

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A285733 as a triangular array

													-1
												1		1
											3		-2		2
										6		2		3		4
									10		5		-3		5		7
								15		9		4		6		8		11
							21		14		8		-4		9		12		16
						28		20		13		7		10		13		17		22
					36		27		19		12		-5		14		18		23		29
				45		35		26		18		11		15		19		24		30		37
			55		44		34		25		17		-6		20		25		31		38		46
		66		54		43		33		24		16		21		26		32		39		47		56
	78		65		53		42		32		23		-7		27		33		40		48		57		67

A285733 as a square array

-1	1	3	6	10	15	21	28	36	45	55	66	78
1	-2	2	5	9	14	20	27	35	44	54	65
2	3	-3	4	8	13	19	26	34	43	53
4	5	6	-4	7	12	18	25	33	42
7	8	9	10	-5	11	17	24	32
11	12	13	14	15	-6	16	23
16	17	18	19	20	21	-7
22	23	24	25	26	27
29	30	31	32	33
37	38	39	40
46	47	48
56	57
67

A285733 as an upper right triangle

-1	1	3	6	10	15	21	28	36	45	55	66	78
	1	-2	2	5	9	14	20	27	35	44	54	65
		2	3	-3	4	8	13	19	26	34	43	53
			4	5	6	-4	7	12	18	25	33	42
				7	8	9	10	-5	11	17	24	32
					11	12	13	14	15	-6	16	23
						16	17	18	19	20	21	-7
							22	23	24	25	26	27
								29	30	31	32	33
									37	38	39	40
										46	47	48
											56	57
												67