A131818 - cp's OEIS frontend

A131818 A130296 + A002260 - A000012. Triangle read by rows: row n consists of n, 2, 3, 4, ..., n.

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

[1, 2, 2, 3, 2, 3, 4, 2, 3, 4, 5, 2, 3, 4, 5, 6, 2, 3, 4, 5, 6, 7, 2, 3, 4, 5, 6, 7, 8, 2, 3, 4, 5, 6, 7, 8, 9, 2, 3, 4, 5, 6, 7, 8, 9, 10, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]

cp's OEIS Frontend

A131818 A130296 + A002260 - A000012. Triangle read by rows: row n consists of n, 2, 3, 4, ..., n.

Table of values

List of values

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

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

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