A127257 - cp's OEIS frontend

A127257 a(n) is the initial element of the sequence A(n) defined exactly like A119752 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	2
2	6
3	18
4	20
5	50
6	68
7	74
8	78
9	90
10	96
11	134
12	138
13	156
14	200
15	204
16	228
17	278
18	288
19	296
20	306
21	326
22	338
23	378
24	384
25	398
26	404
27	440
28	464
29	468
30	504
31	510
32	524
33	530
34	546
35	600
36	608
37	644
38	660
39	704
40	726
41	740
42	774
43	828
44	854
45	870
46	930
47	938
48	944
49	966
50	986
51	1008
52	1034
53	1068

[2, 6, 18, 20, 50, 68, 74, 78, 90, 96, 134, 138, 156, 200, 204, 228, 278, 288, 296, 306, 326, 338, 378, 384, 398, 404, 440, 464, 468, 504, 510, 524, 530, 546, 600, 608, 644, 660, 704, 726, 740, 774, 828, 854, 870, 930, 938, 944, 966, 986, 1008, 1034, 1068]

cp's OEIS Frontend

A127257 a(n) is the initial element of the sequence A(n) defined exactly like A119752 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