A352407 - cp's OEIS frontend

A352407 The number of terms before reaching zero when starting at n and iterating: f(n) = n, f(n+1) = n+1; f(n+k) = (f(n+k-2) * f(n+k-1)) (mod (n+k)), where k>=2.

n	a(n)
0	2
1	3
2	14
3	5
4	5
5	11
6	4
7	42
8	54
9	6
10	17
11	38
12	6
13	27
14	12
15	71
16	20
17	5
18	6
19	8
20	12
21	12
22	42
23	37
24	36
25	23
26	22
27	9
28	5
29	19
30	10
31	35
32	31
33	31
34	60
35	47
36	33
37	44
38	46
39	15
40	8
41	49
42	14
43	9
44	12
45	23
46	35
47	34
48	28
49	11
50	86
51	43
52	20
53	49
54	18
55	17
56	12
57	9
58	22
59	45
60	26
61	5
62	31
63	51
64	72
65	7
66	6
67	121
68	120
69	111
70	86
71	341
72	56
73	63
74	12
75	85
76	12
77	21

[2, 3, 14, 5, 5, 11, 4, 42, 54, 6, 17, 38, 6, 27, 12, 71, 20, 5, 6, 8, 12, 12, 42, 37, 36, 23, 22, 9, 5, 19, 10, 35, 31, 31, 60, 47, 33, 44, 46, 15, 8, 49, 14, 9, 12, 23, 35, 34, 28, 11, 86, 43, 20, 49, 18, 17, 12, 9, 22, 45, 26, 5, 31, 51, 72, 7, 6, 121, 120, 111, 86, 341, 56, 63, 12, 85, 12, 21]

cp's OEIS Frontend

A352407 The number of terms before reaching zero when starting at n and iterating: f(n) = n, f(n+1) = n+1; f(n+k) = (f(n+k-2) * f(n+k-1)) (mod (n+k)), where k>=2.

Table of values

List of values

n	a(n)
0	2
1	3
2	14
3	5
4	5
5	11
6	4
7	42
8	54
9	6
10	17
11	38
12	6
13	27
14	12
15	71
16	20
17	5
18	6
19	8
20	12
21	12
22	42
23	37
24	36
25	23
26	22
27	9
28	5
29	19
30	10
31	35
32	31
33	31
34	60
35	47
36	33
37	44
38	46
39	15
40	8
41	49
42	14
43	9
44	12
45	23
46	35
47	34
48	28
49	11
50	86
51	43
52	20
53	49
54	18
55	17
56	12
57	9
58	22
59	45
60	26
61	5
62	31
63	51
64	72
65	7
66	6
67	121
68	120
69	111
70	86
71	341
72	56
73	63
74	12
75	85
76	12
77	21

n	a(n)
0	2
1	3
2	14
3	5
4	5
5	11
6	4
7	42
8	54
9	6
10	17
11	38
12	6
13	27
14	12
15	71
16	20
17	5
18	6
19	8
20	12
21	12
22	42
23	37
24	36
25	23
26	22
27	9
28	5
29	19
30	10
31	35
32	31
33	31
34	60
35	47
36	33
37	44
38	46
39	15
40	8
41	49
42	14
43	9
44	12
45	23
46	35
47	34
48	28
49	11
50	86
51	43
52	20
53	49
54	18
55	17
56	12
57	9
58	22
59	45
60	26
61	5
62	31
63	51
64	72
65	7
66	6
67	121
68	120
69	111
70	86
71	341
72	56
73	63
74	12
75	85
76	12
77	21

n	a(n)
0	2
1	3
2	14
3	5
4	5
5	11
6	4
7	42
8	54
9	6
10	17
11	38
12	6
13	27
14	12
15	71
16	20
17	5
18	6
19	8
20	12
21	12
22	42
23	37
24	36
25	23
26	22
27	9
28	5
29	19
30	10
31	35
32	31
33	31
34	60
35	47
36	33
37	44
38	46
39	15
40	8
41	49
42	14
43	9
44	12
45	23
46	35
47	34
48	28
49	11
50	86
51	43
52	20
53	49
54	18
55	17
56	12
57	9
58	22
59	45
60	26
61	5
62	31
63	51
64	72
65	7
66	6
67	121
68	120
69	111
70	86
71	341
72	56
73	63
74	12
75	85
76	12
77	21