A177217 - cp's OEIS frontend

A177217 The products k of two distinct primes such that 2k-1, 4k-3, 8k-7, 16k-15, 32k-31, 64k-63, 128k-127 and 256k-255 are also products of two distinct primes.

n	a(n)
1	31261
2	36199
3	44869
4	49471
5	62521
6	72397
7	83086
8	138994
9	173311
10	182527
11	224962
12	259891
13	277987
14	346621
15	370126
16	415423
17	443746
18	464245
19	480331
20	519781
21	544006
22	563326
23	599245
24	693241
25	784681
26	880561
27	928489
28	980743
29	991237
30	1032937

[31261, 36199, 44869, 49471, 62521, 72397, 83086, 138994, 173311, 182527, 224962, 259891, 277987, 346621, 370126, 415423, 443746, 464245, 480331, 519781, 544006, 563326, 599245, 693241, 784681, 880561, 928489, 980743, 991237, 1032937]

cp's OEIS Frontend

A177217 The products k of two distinct primes such that 2k-1, 4k-3, 8k-7, 16k-15, 32k-31, 64k-63, 128k-127 and 256k-255 are also products of two distinct primes.

Table of values

List of values

cp's OEIS Frontend

A177217 The products k of two distinct primes such that 2*k-1, 4*k-3, 8*k-7, 16*k-15, 32*k-31, 64*k-63, 128*k-127 and 256*k-255 are also products of two distinct primes.

Table of values

List of values

A177217 The products k of two distinct primes such that 2k-1, 4k-3, 8k-7, 16k-15, 32k-31, 64k-63, 128k-127 and 256k-255 are also products of two distinct primes.