A085930 - cp's OEIS frontend

A085930 Triangle read by rows in which row n contains n smallest (> 0) numbers which when incremented by n yield a triangular number.

n	a(n)
1	2
2	1
3	4
4	3
5	7
6	12
7	2
8	6
9	11
10	17
11	1
12	5
13	10
14	16
15	23
16	4
17	9
18	15
19	22
20	30
21	39
22	3
23	8
24	14
25	21
26	29
27	38
28	48
29	2
30	7
31	13
32	20
33	28
34	37
35	47
36	58
37	1
38	6
39	12
40	19
41	27
42	36
43	46
44	57
45	69
46	5
47	11
48	18
49	26
50	35
51	45
52	56
53	68
54	81
55	95
56	4
57	10
58	17
59	25
60	34
61	44
62	55
63	67
64	80
65	94
66	109
67	3
68	9
69	16
70	24
71	33
72	43
73	54
74	66
75	79
76	93
77	108
78	124

[2, 1, 4, 3, 7, 12, 2, 6, 11, 17, 1, 5, 10, 16, 23, 4, 9, 15, 22, 30, 39, 3, 8, 14, 21, 29, 38, 48, 2, 7, 13, 20, 28, 37, 47, 58, 1, 6, 12, 19, 27, 36, 46, 57, 69, 5, 11, 18, 26, 35, 45, 56, 68, 81, 95, 4, 10, 17, 25, 34, 44, 55, 67, 80, 94, 109, 3, 9, 16, 24, 33, 43, 54, 66, 79, 93, 108, 124]

cp's OEIS Frontend

A085930 Triangle read by rows in which row n contains n smallest (> 0) numbers which when incremented by n yield a triangular number.

Table of values

List of values

n	a(n)
1	2
2	1
3	4
4	3
5	7
6	12
7	2
8	6
9	11
10	17
11	1
12	5
13	10
14	16
15	23
16	4
17	9
18	15
19	22
20	30
21	39
22	3
23	8
24	14
25	21
26	29
27	38
28	48
29	2
30	7
31	13
32	20
33	28
34	37
35	47
36	58
37	1
38	6
39	12
40	19
41	27
42	36
43	46
44	57
45	69
46	5
47	11
48	18
49	26
50	35
51	45
52	56
53	68
54	81
55	95
56	4
57	10
58	17
59	25
60	34
61	44
62	55
63	67
64	80
65	94
66	109
67	3
68	9
69	16
70	24
71	33
72	43
73	54
74	66
75	79
76	93
77	108
78	124

n	a(n)
1	2
2	1
3	4
4	3
5	7
6	12
7	2
8	6
9	11
10	17
11	1
12	5
13	10
14	16
15	23
16	4
17	9
18	15
19	22
20	30
21	39
22	3
23	8
24	14
25	21
26	29
27	38
28	48
29	2
30	7
31	13
32	20
33	28
34	37
35	47
36	58
37	1
38	6
39	12
40	19
41	27
42	36
43	46
44	57
45	69
46	5
47	11
48	18
49	26
50	35
51	45
52	56
53	68
54	81
55	95
56	4
57	10
58	17
59	25
60	34
61	44
62	55
63	67
64	80
65	94
66	109
67	3
68	9
69	16
70	24
71	33
72	43
73	54
74	66
75	79
76	93
77	108
78	124

n	a(n)
1	2
2	1
3	4
4	3
5	7
6	12
7	2
8	6
9	11
10	17
11	1
12	5
13	10
14	16
15	23
16	4
17	9
18	15
19	22
20	30
21	39
22	3
23	8
24	14
25	21
26	29
27	38
28	48
29	2
30	7
31	13
32	20
33	28
34	37
35	47
36	58
37	1
38	6
39	12
40	19
41	27
42	36
43	46
44	57
45	69
46	5
47	11
48	18
49	26
50	35
51	45
52	56
53	68
54	81
55	95
56	4
57	10
58	17
59	25
60	34
61	44
62	55
63	67
64	80
65	94
66	109
67	3
68	9
69	16
70	24
71	33
72	43
73	54
74	66
75	79
76	93
77	108
78	124