A177212 - cp's OEIS frontend

A177212 Numbers k that are the products of two distinct primes such that 2k-1, 4k-3 and 8*k-7 are also products of two distinct primes.

n	a(n)
1	247
2	249
3	295
4	395
5	422
6	478
7	493
8	502
9	519
10	589
11	634
12	694
13	721
14	755
15	955
16	1255
17	1267
18	1294
19	1306
20	1351
21	1387
22	1441
23	1522
24	1546
25	1727
26	1762
27	1942
28	2031
29	2119
30	2155
31	2323
32	2374
33	2449
34	2491
35	2509
36	2533
37	2587
38	2623
39	2661
40	2733
41	2773
42	3005
43	3039
44	3091
45	3334

[247, 249, 295, 395, 422, 478, 493, 502, 519, 589, 634, 694, 721, 755, 955, 1255, 1267, 1294, 1306, 1351, 1387, 1441, 1522, 1546, 1727, 1762, 1942, 2031, 2119, 2155, 2323, 2374, 2449, 2491, 2509, 2533, 2587, 2623, 2661, 2733, 2773, 3005, 3039, 3091, 3334]

cp's OEIS Frontend

A177212 Numbers k that are the products of two distinct primes such that 2k-1, 4k-3 and 8*k-7 are also products of two distinct primes.

Table of values

List of values

cp's OEIS Frontend

A177212 Numbers k that are the products of two distinct primes such that 2*k-1, 4*k-3 and 8*k-7 are also products of two distinct primes.

Table of values

List of values

A177212 Numbers k that are the products of two distinct primes such that 2k-1, 4k-3 and 8*k-7 are also products of two distinct primes.