A195111 - OEIS

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A195111 as a triangular array

											1
										3		2
									6		4		5
								10		8		9		7
							15		13		14		11		12
						21		19		20		16		17		18
					28		26		27		23		24		25		22
				36		34		35		31		32		33		29		30
			45		43		44		40		41		42		37		38		39
		55		53		54		50		51		52		46		47		48		49
	66		64		65		61		62		63		57		58		59		60		56
78		76		77

A195111 as a square array

1	3	6	10	15	21	28	36	45	55	66	78
2	4	8	13	19	26	34	43	53	64	76
5	9	14	20	27	35	44	54	65	77
7	11	16	23	31	40	50	61
12	17	24	32	41	51	62
18	25	33	42	52	63
22	29	37	46	57
30	38	47	58
39	48	59
49	60
56

A195111 as an upper right triangle

1	3	6	10	15	21	28	36	45	55	66	78
	2	4	8	13	19	26	34	43	53	64	76
		5	9	14	20	27	35	44	54	65	77
			7	11	16	23	31	40	50	61
				12	17	24	32	41	51	62
					18	25	33	42	52	63
						22	29	37	46	57
							30	38	47	58
								39	48	59
									49	60
										56

											1
										3		2
									6		4		5
								10		8		9		7
							15		13		14		11		12
						21		19		20		16		17		18
					28		26		27		23		24		25		22
				36		34		35		31		32		33		29		30
			45		43		44		40		41		42		37		38		39
		55		53		54		50		51		52		46		47		48		49
	66		64		65		61		62		63		57		58		59		60		56
78		76		77

1	3	6	10	15	21	28	36	45	55	66	78
2	4	8	13	19	26	34	43	53	64	76
5	9	14	20	27	35	44	54	65	77
7	11	16	23	31	40	50	61
12	17	24	32	41	51	62
18	25	33	42	52	63
22	29	37	46	57
30	38	47	58
39	48	59
49	60
56

1	3	6	10	15	21	28	36	45	55	66	78
	2	4	8	13	19	26	34	43	53	64	76
		5	9	14	20	27	35	44	54	65	77
			7	11	16	23	31	40	50	61
				12	17	24	32	41	51	62
					18	25	33	42	52	63
						22	29	37	46	57
							30	38	47	58
								39	48	59
									49	60
										56

											1
										3		2
									6		4		5
								10		8		9		7
							15		13		14		11		12
						21		19		20		16		17		18
					28		26		27		23		24		25		22
				36		34		35		31		32		33		29		30
			45		43		44		40		41		42		37		38		39
		55		53		54		50		51		52		46		47		48		49
	66		64		65		61		62		63		57		58		59		60		56
78		76		77

1	3	6	10	15	21	28	36	45	55	66	78
2	4	8	13	19	26	34	43	53	64	76
5	9	14	20	27	35	44	54	65	77
7	11	16	23	31	40	50	61
12	17	24	32	41	51	62
18	25	33	42	52	63
22	29	37	46	57
30	38	47	58
39	48	59
49	60
56

1	3	6	10	15	21	28	36	45	55	66	78
	2	4	8	13	19	26	34	43	53	64	76
		5	9	14	20	27	35	44	54	65	77
			7	11	16	23	31	40	50	61
				12	17	24	32	41	51	62
					18	25	33	42	52	63
						22	29	37	46	57
							30	38	47	58
								39	48	59
									49	60
										56

											1
										3		2
									6		4		5
								10		8		9		7
							15		13		14		11		12
						21		19		20		16		17		18
					28		26		27		23		24		25		22
				36		34		35		31		32		33		29		30
			45		43		44		40		41		42		37		38		39
		55		53		54		50		51		52		46		47		48		49
	66		64		65		61		62		63		57		58		59		60		56
78		76		77

1	3	6	10	15	21	28	36	45	55	66	78
2	4	8	13	19	26	34	43	53	64	76
5	9	14	20	27	35	44	54	65	77
7	11	16	23	31	40	50	61
12	17	24	32	41	51	62
18	25	33	42	52	63
22	29	37	46	57
30	38	47	58
39	48	59
49	60
56

1	3	6	10	15	21	28	36	45	55	66	78
	2	4	8	13	19	26	34	43	53	64	76
		5	9	14	20	27	35	44	54	65	77
			7	11	16	23	31	40	50	61
				12	17	24	32	41	51	62
					18	25	33	42	52	63
						22	29	37	46	57
							30	38	47	58
								39	48	59
									49	60
										56