A192220 - cp's OEIS frontend

A192220 Semiprimes s such that tau(s-1) = tau(s+1) where tau = A000005.

n	a(n)
1	4
2	6
3	9
4	34
5	51
6	55
7	86
8	94
9	129
10	142
11	183
12	185
13	202
14	214
15	218
16	247
17	249
18	302
19	341
20	394
21	415
22	446
23	471
24	473
25	535
26	583
27	634
28	698
29	723
30	737
31	807
32	851
33	905
34	922
35	926
36	949
37	1042
38	1138
39	1149
40	1205
41	1211
42	1241
43	1257
44	1262
45	1313
46	1315
47	1337
48	1346
49	1402
50	1527
51	1546
52	1577
53	1594
54	1642
55	1646
56	1673
57	1687

[4, 6, 9, 34, 51, 55, 86, 94, 129, 142, 183, 185, 202, 214, 218, 247, 249, 302, 341, 394, 415, 446, 471, 473, 535, 583, 634, 698, 723, 737, 807, 851, 905, 922, 926, 949, 1042, 1138, 1149, 1205, 1211, 1241, 1257, 1262, 1313, 1315, 1337, 1346, 1402, 1527, 1546, 1577, 1594, 1642, 1646, 1673, 1687]

cp's OEIS Frontend

A192220 Semiprimes s such that tau(s-1) = tau(s+1) where tau = A000005.

Table of values

List of values