A068192 - cp's OEIS frontend

A068192 Let a(1)=2, f(n) = 4a(1)a(2)...a(n-1) for n >= 1 and a(n) = f(n)-prevprime(f(n)-1) for n >= 2, where prevprime(x) is the largest prime < x.

n	a(n)
1	2
2	3
3	5
4	7
5	11
6	13
7	17
8	19
9	31
10	29
11	23
12	41
13	43
14	37
15	89
16	59
17	53
18	67
19	79
20	71
21	137
22	109
23	239
24	167
25	199
26	47
27	83
28	97
29	61
30	373
31	101
32	179
33	193
34	131
35	151
36	73
37	263
38	593
39	139
40	113
41	157
42	103
43	241
44	181
45	397
46	233
47	617
48	311
49	191
50	229
51	271
52	269
53	127
54	223
55	331
56	337
57	211
58	163

[2, 3, 5, 7, 11, 13, 17, 19, 31, 29, 23, 41, 43, 37, 89, 59, 53, 67, 79, 71, 137, 109, 239, 167, 199, 47, 83, 97, 61, 373, 101, 179, 193, 131, 151, 73, 263, 593, 139, 113, 157, 103, 241, 181, 397, 233, 617, 311, 191, 229, 271, 269, 127, 223, 331, 337, 211, 163]

cp's OEIS Frontend

A068192 Let a(1)=2, f(n) = 4a(1)a(2)...a(n-1) for n >= 1 and a(n) = f(n)-prevprime(f(n)-1) for n >= 2, where prevprime(x) is the largest prime < x.

Table of values

List of values

n	a(n)
1	2
2	3
3	5
4	7
5	11
6	13
7	17
8	19
9	31
10	29
11	23
12	41
13	43
14	37
15	89
16	59
17	53
18	67
19	79
20	71
21	137
22	109
23	239
24	167
25	199
26	47
27	83
28	97
29	61
30	373
31	101
32	179
33	193
34	131
35	151
36	73
37	263
38	593
39	139
40	113
41	157
42	103
43	241
44	181
45	397
46	233
47	617
48	311
49	191
50	229
51	271
52	269
53	127
54	223
55	331
56	337
57	211
58	163

n	a(n)
1	2
2	3
3	5
4	7
5	11
6	13
7	17
8	19
9	31
10	29
11	23
12	41
13	43
14	37
15	89
16	59
17	53
18	67
19	79
20	71
21	137
22	109
23	239
24	167
25	199
26	47
27	83
28	97
29	61
30	373
31	101
32	179
33	193
34	131
35	151
36	73
37	263
38	593
39	139
40	113
41	157
42	103
43	241
44	181
45	397
46	233
47	617
48	311
49	191
50	229
51	271
52	269
53	127
54	223
55	331
56	337
57	211
58	163

cp's OEIS Frontend

A068192 Let a(1)=2, f(n) = 4*a(1)*a(2)*...*a(n-1) for n >= 1 and a(n) = f(n)-prevprime(f(n)-1) for n >= 2, where prevprime(x) is the largest prime < x.

Table of values

List of values

A068192 Let a(1)=2, f(n) = 4a(1)a(2)...a(n-1) for n >= 1 and a(n) = f(n)-prevprime(f(n)-1) for n >= 2, where prevprime(x) is the largest prime < x.

n	a(n)
1	2
2	3
3	5
4	7
5	11
6	13
7	17
8	19
9	31
10	29
11	23
12	41
13	43
14	37
15	89
16	59
17	53
18	67
19	79
20	71
21	137
22	109
23	239
24	167
25	199
26	47
27	83
28	97
29	61
30	373
31	101
32	179
33	193
34	131
35	151
36	73
37	263
38	593
39	139
40	113
41	157
42	103
43	241
44	181
45	397
46	233
47	617
48	311
49	191
50	229
51	271
52	269
53	127
54	223
55	331
56	337
57	211
58	163