A177216 - cp's OEIS frontend

A177216 Numbers k that are the products of two distinct primes such that 2k-1, 4k-3, 8k-7, 16k-15, 32k-31, 64k-63 and 128*k-127 are also products of two distinct primes.

n	a(n)
1	11293
2	12139
3	25399
4	31261
5	36199
6	44869
7	49471
8	62521
9	72397
10	83086
11	89737
12	91705
13	98941
14	124846
15	125041
16	134023
17	138994
18	144793
19	164041
20	166171
21	170431
22	173311
23	182527
24	199543
25	224962
26	244294
27	258169
28	259891
29	263086
30	275281
31	277987

[11293, 12139, 25399, 31261, 36199, 44869, 49471, 62521, 72397, 83086, 89737, 91705, 98941, 124846, 125041, 134023, 138994, 144793, 164041, 166171, 170431, 173311, 182527, 199543, 224962, 244294, 258169, 259891, 263086, 275281, 277987]

cp's OEIS Frontend

A177216 Numbers k that are the products of two distinct primes such that 2k-1, 4k-3, 8k-7, 16k-15, 32k-31, 64k-63 and 128*k-127 are also products of two distinct primes.

Table of values

List of values

cp's OEIS Frontend

A177216 Numbers k that are the products of two distinct primes such that 2*k-1, 4*k-3, 8*k-7, 16*k-15, 32*k-31, 64*k-63 and 128*k-127 are also products of two distinct primes.

Table of values

List of values

A177216 Numbers k that are the products of two distinct primes such that 2k-1, 4k-3, 8k-7, 16k-15, 32k-31, 64k-63 and 128*k-127 are also products of two distinct primes.