A127256 - cp's OEIS frontend

A127256 a(n) is the initial element of the sequence A(n) defined exactly like A119751 but with the additional condition that each of its elements must not be contained in any of the sequences A(k) for k < n.

n	a(n)
1	1
2	5
3	15
4	23
5	33
6	41
7	53
8	75
9	89
10	99
11	105
12	113
13	153
14	155
15	165
16	189
17	215
18	239
19	249
20	261
21	281
22	293
23	323
24	341
25	363
26	371
27	375
28	405
29	411
30	419
31	431
32	473
33	519
34	543
35	545
36	561
37	575
38	629
39	659
40	699
41	725
42	741
43	743
44	765
45	785
46	803
47	831
48	849
49	893
50	905
51	915
52	923
53	933
54	935

[1, 5, 15, 23, 33, 41, 53, 75, 89, 99, 105, 113, 153, 155, 165, 189, 215, 239, 249, 261, 281, 293, 323, 341, 363, 371, 375, 405, 411, 419, 431, 473, 519, 543, 545, 561, 575, 629, 659, 699, 725, 741, 743, 765, 785, 803, 831, 849, 893, 905, 915, 923, 933, 935]

cp's OEIS Frontend

A127256 a(n) is the initial element of the sequence A(n) defined exactly like A119751 but with the additional condition that each of its elements must not be contained in any of the sequences A(k) for k < n.

Table of values

List of values

n	a(n)
1	1
2	5
3	15
4	23
5	33
6	41
7	53
8	75
9	89
10	99
11	105
12	113
13	153
14	155
15	165
16	189
17	215
18	239
19	249
20	261
21	281
22	293
23	323
24	341
25	363
26	371
27	375
28	405
29	411
30	419
31	431
32	473
33	519
34	543
35	545
36	561
37	575
38	629
39	659
40	699
41	725
42	741
43	743
44	765
45	785
46	803
47	831
48	849
49	893
50	905
51	915
52	923
53	933
54	935

n	a(n)
1	1
2	5
3	15
4	23
5	33
6	41
7	53
8	75
9	89
10	99
11	105
12	113
13	153
14	155
15	165
16	189
17	215
18	239
19	249
20	261
21	281
22	293
23	323
24	341
25	363
26	371
27	375
28	405
29	411
30	419
31	431
32	473
33	519
34	543
35	545
36	561
37	575
38	629
39	659
40	699
41	725
42	741
43	743
44	765
45	785
46	803
47	831
48	849
49	893
50	905
51	915
52	923
53	933
54	935

n	a(n)
1	1
2	5
3	15
4	23
5	33
6	41
7	53
8	75
9	89
10	99
11	105
12	113
13	153
14	155
15	165
16	189
17	215
18	239
19	249
20	261
21	281
22	293
23	323
24	341
25	363
26	371
27	375
28	405
29	411
30	419
31	431
32	473
33	519
34	543
35	545
36	561
37	575
38	629
39	659
40	699
41	725
42	741
43	743
44	765
45	785
46	803
47	831
48	849
49	893
50	905
51	915
52	923
53	933
54	935