A053403 - cp's OEIS frontend

A053403 Consider the set P of pairs (a,b) generated by the rules: (1,1) is in P; if (a,b) is in P then (b,a+b) is in P; if (a,b) and (a',b') are in P then (aa', bb') is in P. Sequence gives numbers not appearing in P.

n	a(n)
1	7
2	11
3	19
4	29
5	31
6	47
7	49
8	53
9	67
10	71
11	73
12	79
13	87
14	91
15	103
16	119
17	127
18	131
19	137
20	139
21	141
22	142
23	143
24	146
25	147
26	151
27	155
28	179
29	191
30	193
31	201
32	203
33	211
34	213
35	219
36	223
37	227
38	229
39	235
40	237
41	239
42	247
43	251
44	265
45	271
46	301
47	329
48	331
49	337
50	341
51	343
52	347
53	355
54	358
55	359

[7, 11, 19, 29, 31, 47, 49, 53, 67, 71, 73, 79, 87, 91, 103, 119, 127, 131, 137, 139, 141, 142, 143, 146, 147, 151, 155, 179, 191, 193, 201, 203, 211, 213, 219, 223, 227, 229, 235, 237, 239, 247, 251, 265, 271, 301, 329, 331, 337, 341, 343, 347, 355, 358, 359]

cp's OEIS Frontend

A053403 Consider the set P of pairs (a,b) generated by the rules: (1,1) is in P; if (a,b) is in P then (b,a+b) is in P; if (a,b) and (a',b') are in P then (aa', bb') is in P. Sequence gives numbers not appearing in P.

Table of values

List of values

n	a(n)
1	7
2	11
3	19
4	29
5	31
6	47
7	49
8	53
9	67
10	71
11	73
12	79
13	87
14	91
15	103
16	119
17	127
18	131
19	137
20	139
21	141
22	142
23	143
24	146
25	147
26	151
27	155
28	179
29	191
30	193
31	201
32	203
33	211
34	213
35	219
36	223
37	227
38	229
39	235
40	237
41	239
42	247
43	251
44	265
45	271
46	301
47	329
48	331
49	337
50	341
51	343
52	347
53	355
54	358
55	359

n	a(n)
1	7
2	11
3	19
4	29
5	31
6	47
7	49
8	53
9	67
10	71
11	73
12	79
13	87
14	91
15	103
16	119
17	127
18	131
19	137
20	139
21	141
22	142
23	143
24	146
25	147
26	151
27	155
28	179
29	191
30	193
31	201
32	203
33	211
34	213
35	219
36	223
37	227
38	229
39	235
40	237
41	239
42	247
43	251
44	265
45	271
46	301
47	329
48	331
49	337
50	341
51	343
52	347
53	355
54	358
55	359

n	a(n)
1	7
2	11
3	19
4	29
5	31
6	47
7	49
8	53
9	67
10	71
11	73
12	79
13	87
14	91
15	103
16	119
17	127
18	131
19	137
20	139
21	141
22	142
23	143
24	146
25	147
26	151
27	155
28	179
29	191
30	193
31	201
32	203
33	211
34	213
35	219
36	223
37	227
38	229
39	235
40	237
41	239
42	247
43	251
44	265
45	271
46	301
47	329
48	331
49	337
50	341
51	343
52	347
53	355
54	358
55	359