A063163 - cp's OEIS frontend

A063163 Composite numbers which in base 7 contain their largest proper factor as a substring.

n	a(n)
1	49
2	77
3	91
4	119
5	133
6	161
7	203
8	217
9	259
10	287
11	301
12	329
13	343
14	371
15	413
16	427
17	469
18	497
19	511
20	539
21	551
22	553
23	581
24	623
25	637
26	679
27	707
28	721
29	749
30	763
31	791
32	833
33	847
34	889
35	917
36	931
37	959
38	973
39	989
40	1001
41	1043
42	1057
43	1099
44	1127
45	1141
46	1169
47	1183
48	1211
49	1253

[49, 77, 91, 119, 133, 161, 203, 217, 259, 287, 301, 329, 343, 371, 413, 427, 469, 497, 511, 539, 551, 553, 581, 623, 637, 679, 707, 721, 749, 763, 791, 833, 847, 889, 917, 931, 959, 973, 989, 1001, 1043, 1057, 1099, 1127, 1141, 1169, 1183, 1211, 1253]

cp's OEIS Frontend

A063163 Composite numbers which in base 7 contain their largest proper factor as a substring.

Table of values

List of values