A278167 - cp's OEIS frontend

A278167 a(n) = number of primes encountered before reaching 0 when starting from k = ((n+1)^2)-1 and iterating map k -> k - A002828(k).

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	3
7	5
8	6
9	7
10	7
11	9
12	10
13	12
14	12
15	15
16	17
17	17
18	20
19	20
20	22
21	22
22	23
23	27
24	29
25	32
26	34
27	38
28	40
29	40
30	43
31	46
32	48
33	53
34	56
35	60
36	63
37	66
38	69
39	71
40	75
41	77
42	79
43	83
44	86
45	89
46	92
47	98
48	101
49	102
50	105
51	109
52	111
53	117
54	120
55	123
56	125
57	130
58	135
59	140
60	145
61	149
62	152
63	159
64	163
65	167
66	173
67	177
68	179
69	183
70	189
71	194
72	199
73	204
74	208
75	215
76	219
77	223
78	230
79	234

[1, 1, 2, 2, 2, 3, 5, 6, 7, 7, 9, 10, 12, 12, 15, 17, 17, 20, 20, 22, 22, 23, 27, 29, 32, 34, 38, 40, 40, 43, 46, 48, 53, 56, 60, 63, 66, 69, 71, 75, 77, 79, 83, 86, 89, 92, 98, 101, 102, 105, 109, 111, 117, 120, 123, 125, 130, 135, 140, 145, 149, 152, 159, 163, 167, 173, 177, 179, 183, 189, 194, 199, 204, 208, 215, 219, 223, 230, 234]

cp's OEIS Frontend

A278167 a(n) = number of primes encountered before reaching 0 when starting from k = ((n+1)^2)-1 and iterating map k -> k - A002828(k).

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	3
7	5
8	6
9	7
10	7
11	9
12	10
13	12
14	12
15	15
16	17
17	17
18	20
19	20
20	22
21	22
22	23
23	27
24	29
25	32
26	34
27	38
28	40
29	40
30	43
31	46
32	48
33	53
34	56
35	60
36	63
37	66
38	69
39	71
40	75
41	77
42	79
43	83
44	86
45	89
46	92
47	98
48	101
49	102
50	105
51	109
52	111
53	117
54	120
55	123
56	125
57	130
58	135
59	140
60	145
61	149
62	152
63	159
64	163
65	167
66	173
67	177
68	179
69	183
70	189
71	194
72	199
73	204
74	208
75	215
76	219
77	223
78	230
79	234

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	3
7	5
8	6
9	7
10	7
11	9
12	10
13	12
14	12
15	15
16	17
17	17
18	20
19	20
20	22
21	22
22	23
23	27
24	29
25	32
26	34
27	38
28	40
29	40
30	43
31	46
32	48
33	53
34	56
35	60
36	63
37	66
38	69
39	71
40	75
41	77
42	79
43	83
44	86
45	89
46	92
47	98
48	101
49	102
50	105
51	109
52	111
53	117
54	120
55	123
56	125
57	130
58	135
59	140
60	145
61	149
62	152
63	159
64	163
65	167
66	173
67	177
68	179
69	183
70	189
71	194
72	199
73	204
74	208
75	215
76	219
77	223
78	230
79	234

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	3
7	5
8	6
9	7
10	7
11	9
12	10
13	12
14	12
15	15
16	17
17	17
18	20
19	20
20	22
21	22
22	23
23	27
24	29
25	32
26	34
27	38
28	40
29	40
30	43
31	46
32	48
33	53
34	56
35	60
36	63
37	66
38	69
39	71
40	75
41	77
42	79
43	83
44	86
45	89
46	92
47	98
48	101
49	102
50	105
51	109
52	111
53	117
54	120
55	123
56	125
57	130
58	135
59	140
60	145
61	149
62	152
63	159
64	163
65	167
66	173
67	177
68	179
69	183
70	189
71	194
72	199
73	204
74	208
75	215
76	219
77	223
78	230
79	234