A325277 - cp's OEIS frontend

A325277 Irregular triangle read by rows where row 1 is {1} and row n is the sequence starting with n and repeatedly applying A181819 until a prime number is reached.

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

[1, 2, 3, 4, 3, 5, 6, 4, 3, 7, 8, 5, 9, 3, 10, 4, 3, 11, 12, 6, 4, 3, 13, 14, 4, 3, 15, 4, 3, 16, 7, 17, 18, 6, 4, 3, 19, 20, 6, 4, 3, 21, 4, 3, 22, 4, 3, 23, 24, 10, 4, 3, 25, 3, 26, 4, 3, 27, 5, 28, 6, 4, 3, 29, 30, 8, 5, 31, 32, 11, 33, 4, 3]

cp's OEIS Frontend

A325277 Irregular triangle read by rows where row 1 is {1} and row n is the sequence starting with n and repeatedly applying A181819 until a prime number is reached.

Table of values

List of values

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

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

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