A258195 - cp's OEIS frontend

A258195 Define a<+>b = odd part(odd part(a) + odd part(b)), where odd part(n) = A000265(n); a(n) is not already appeared prime of the form <+>_{1<=i<=k}i with the smallest k, or a(n)=0 if there is no such k (see comment).

n	a(n)
1	3
2	5
3	7
4	17
5	19
6	23
7	11
8	13
9	53
10	37
11	47
12	43
13	29
14	61
15	31
16	41
17	83
18	79
19	73
20	103
21	137
22	109
23	113
24	151
25	149
26	139
27	193
28	157
29	167
30	71
31	199
32	229
33	179
34	181
35	223
36	191
37	107
38	173
39	97
40	269
41	241
42	101
43	59
44	233
45	197
46	227
47	251
48	263
49	89
50	211
51	239
52	131
53	293
54	67
55	307
56	379
57	277

[3, 5, 7, 17, 19, 23, 11, 13, 53, 37, 47, 43, 29, 61, 31, 41, 83, 79, 73, 103, 137, 109, 113, 151, 149, 139, 193, 157, 167, 71, 199, 229, 179, 181, 223, 191, 107, 173, 97, 269, 241, 101, 59, 233, 197, 227, 251, 263, 89, 211, 239, 131, 293, 67, 307, 379, 277]

cp's OEIS Frontend

A258195 Define a<+>b = odd part(odd part(a) + odd part(b)), where odd part(n) = A000265(n); a(n) is not already appeared prime of the form <+>_{1<=i<=k}i with the smallest k, or a(n)=0 if there is no such k (see comment).

Table of values

List of values

n	a(n)
1	3
2	5
3	7
4	17
5	19
6	23
7	11
8	13
9	53
10	37
11	47
12	43
13	29
14	61
15	31
16	41
17	83
18	79
19	73
20	103
21	137
22	109
23	113
24	151
25	149
26	139
27	193
28	157
29	167
30	71
31	199
32	229
33	179
34	181
35	223
36	191
37	107
38	173
39	97
40	269
41	241
42	101
43	59
44	233
45	197
46	227
47	251
48	263
49	89
50	211
51	239
52	131
53	293
54	67
55	307
56	379
57	277

n	a(n)
1	3
2	5
3	7
4	17
5	19
6	23
7	11
8	13
9	53
10	37
11	47
12	43
13	29
14	61
15	31
16	41
17	83
18	79
19	73
20	103
21	137
22	109
23	113
24	151
25	149
26	139
27	193
28	157
29	167
30	71
31	199
32	229
33	179
34	181
35	223
36	191
37	107
38	173
39	97
40	269
41	241
42	101
43	59
44	233
45	197
46	227
47	251
48	263
49	89
50	211
51	239
52	131
53	293
54	67
55	307
56	379
57	277

n	a(n)
1	3
2	5
3	7
4	17
5	19
6	23
7	11
8	13
9	53
10	37
11	47
12	43
13	29
14	61
15	31
16	41
17	83
18	79
19	73
20	103
21	137
22	109
23	113
24	151
25	149
26	139
27	193
28	157
29	167
30	71
31	199
32	229
33	179
34	181
35	223
36	191
37	107
38	173
39	97
40	269
41	241
42	101
43	59
44	233
45	197
46	227
47	251
48	263
49	89
50	211
51	239
52	131
53	293
54	67
55	307
56	379
57	277