A138798 - cp's OEIS frontend

A138798 Values of j corresponding to least possible k>0 with T(k)-T(j)=n, where T(i)>0 are the triangular numbers A000217.

n	a(n)
2	1
3	2
4	3
5	1
6	5
7	2
8	7
9	1
10	9
11	4
12	2
13	5
14	1
15	3
16	15
17	7
18	2
19	8
20	1
21	5
22	3
23	10
24	6
25	2
26	4
27	1
28	27
29	13
30	3
31	14
32	31
33	2
34	6
35	1
36	10
37	17
38	7
39	3
40	5
41	19
42	2
43	20
44	1
45	4
46	9
47	22
48	14
49	3
50	7
51	5
52	2
53	25
54	1
55	8
56	4
57	6
58	12
59	28
60	3
61	29
62	13
63	2
64	63
65	1
66	14
67	32
68	4
69	8
70	6
71	34
72	3
73	35
74	16
75	2
76	5
77	1
78	17
79	38
80	13
81	4
82	18
83	40
84	6
85	3
86	19
87	11
88	2
89	43
90	1

[1, 2, 3, 1, 5, 2, 7, 1, 9, 4, 2, 5, 1, 3, 15, 7, 2, 8, 1, 5, 3, 10, 6, 2, 4, 1, 27, 13, 3, 14, 31, 2, 6, 1, 10, 17, 7, 3, 5, 19, 2, 20, 1, 4, 9, 22, 14, 3, 7, 5, 2, 25, 1, 8, 4, 6, 12, 28, 3, 29, 13, 2, 63, 1, 14, 32, 4, 8, 6, 34, 3, 35, 16, 2, 5, 1, 17, 38, 13, 4, 18, 40, 6, 3, 19, 11, 2, 43, 1]

cp's OEIS Frontend

A138798 Values of j corresponding to least possible k>0 with T(k)-T(j)=n, where T(i)>0 are the triangular numbers A000217.

Table of values

List of values

n	a(n)
2	1
3	2
4	3
5	1
6	5
7	2
8	7
9	1
10	9
11	4
12	2
13	5
14	1
15	3
16	15
17	7
18	2
19	8
20	1
21	5
22	3
23	10
24	6
25	2
26	4
27	1
28	27
29	13
30	3
31	14
32	31
33	2
34	6
35	1
36	10
37	17
38	7
39	3
40	5
41	19
42	2
43	20
44	1
45	4
46	9
47	22
48	14
49	3
50	7
51	5
52	2
53	25
54	1
55	8
56	4
57	6
58	12
59	28
60	3
61	29
62	13
63	2
64	63
65	1
66	14
67	32
68	4
69	8
70	6
71	34
72	3
73	35
74	16
75	2
76	5
77	1
78	17
79	38
80	13
81	4
82	18
83	40
84	6
85	3
86	19
87	11
88	2
89	43
90	1

n	a(n)
2	1
3	2
4	3
5	1
6	5
7	2
8	7
9	1
10	9
11	4
12	2
13	5
14	1
15	3
16	15
17	7
18	2
19	8
20	1
21	5
22	3
23	10
24	6
25	2
26	4
27	1
28	27
29	13
30	3
31	14
32	31
33	2
34	6
35	1
36	10
37	17
38	7
39	3
40	5
41	19
42	2
43	20
44	1
45	4
46	9
47	22
48	14
49	3
50	7
51	5
52	2
53	25
54	1
55	8
56	4
57	6
58	12
59	28
60	3
61	29
62	13
63	2
64	63
65	1
66	14
67	32
68	4
69	8
70	6
71	34
72	3
73	35
74	16
75	2
76	5
77	1
78	17
79	38
80	13
81	4
82	18
83	40
84	6
85	3
86	19
87	11
88	2
89	43
90	1

n	a(n)
2	1
3	2
4	3
5	1
6	5
7	2
8	7
9	1
10	9
11	4
12	2
13	5
14	1
15	3
16	15
17	7
18	2
19	8
20	1
21	5
22	3
23	10
24	6
25	2
26	4
27	1
28	27
29	13
30	3
31	14
32	31
33	2
34	6
35	1
36	10
37	17
38	7
39	3
40	5
41	19
42	2
43	20
44	1
45	4
46	9
47	22
48	14
49	3
50	7
51	5
52	2
53	25
54	1
55	8
56	4
57	6
58	12
59	28
60	3
61	29
62	13
63	2
64	63
65	1
66	14
67	32
68	4
69	8
70	6
71	34
72	3
73	35
74	16
75	2
76	5
77	1
78	17
79	38
80	13
81	4
82	18
83	40
84	6
85	3
86	19
87	11
88	2
89	43
90	1