A384372 - cp's OEIS frontend

A384372 Numbers m such that both m-1 and m+1 are the product of at least 4 not necessarily distinct primes.

n	a(n)
1	55
2	89
3	127
4	151
5	161
6	197
7	199
8	209
9	233
10	249
11	251
12	271
13	295
14	305
15	307
16	329
17	341
18	343
19	349
20	351
21	377
22	379
23	391
24	415
25	449
26	461
27	463
28	485
29	487
30	489
31	491
32	511
33	521
34	545
35	551
36	559
37	569
38	571
39	593
40	631
41	649
42	665
43	685
44	687
45	689
46	701
47	703
48	713
49	727
50	737
51	739
52	749
53	751

[55, 89, 127, 151, 161, 197, 199, 209, 233, 249, 251, 271, 295, 305, 307, 329, 341, 343, 349, 351, 377, 379, 391, 415, 449, 461, 463, 485, 487, 489, 491, 511, 521, 545, 551, 559, 569, 571, 593, 631, 649, 665, 685, 687, 689, 701, 703, 713, 727, 737, 739, 749, 751]

cp's OEIS Frontend

A384372 Numbers m such that both m-1 and m+1 are the product of at least 4 not necessarily distinct primes.

Table of values

List of values

n	a(n)
1	55
2	89
3	127
4	151
5	161
6	197
7	199
8	209
9	233
10	249
11	251
12	271
13	295
14	305
15	307
16	329
17	341
18	343
19	349
20	351
21	377
22	379
23	391
24	415
25	449
26	461
27	463
28	485
29	487
30	489
31	491
32	511
33	521
34	545
35	551
36	559
37	569
38	571
39	593
40	631
41	649
42	665
43	685
44	687
45	689
46	701
47	703
48	713
49	727
50	737
51	739
52	749
53	751

n	a(n)
1	55
2	89
3	127
4	151
5	161
6	197
7	199
8	209
9	233
10	249
11	251
12	271
13	295
14	305
15	307
16	329
17	341
18	343
19	349
20	351
21	377
22	379
23	391
24	415
25	449
26	461
27	463
28	485
29	487
30	489
31	491
32	511
33	521
34	545
35	551
36	559
37	569
38	571
39	593
40	631
41	649
42	665
43	685
44	687
45	689
46	701
47	703
48	713
49	727
50	737
51	739
52	749
53	751

n	a(n)
1	55
2	89
3	127
4	151
5	161
6	197
7	199
8	209
9	233
10	249
11	251
12	271
13	295
14	305
15	307
16	329
17	341
18	343
19	349
20	351
21	377
22	379
23	391
24	415
25	449
26	461
27	463
28	485
29	487
30	489
31	491
32	511
33	521
34	545
35	551
36	559
37	569
38	571
39	593
40	631
41	649
42	665
43	685
44	687
45	689
46	701
47	703
48	713
49	727
50	737
51	739
52	749
53	751