A140803 - cp's OEIS frontend

A140803 Numbers of the form (2^(pq)-1) /((2^p-1)(2^q-1)), where p>q are primes.

n	a(n)
1	3
2	11
3	43
4	151
5	683
6	2359
7	2731
8	43691
9	174763
10	599479
11	2796203
12	8727391
13	9588151
14	178956971
15	715827883
16	2454285751
17	39268347319
18	45812984491
19	567767102431
20	733007751851
21	2932031007403
22	10052678938039
23	46912496118443
24	145295143558111
25	3002399751580331
26	41175768098368951
27	192153584101141163

[3, 11, 43, 151, 683, 2359, 2731, 43691, 174763, 599479, 2796203, 8727391, 9588151, 178956971, 715827883, 2454285751, 39268347319, 45812984491, 567767102431, 733007751851, 2932031007403, 10052678938039, 46912496118443, 145295143558111, 3002399751580331, 41175768098368951, 192153584101141163]

cp's OEIS Frontend

A140803 Numbers of the form (2^(pq)-1) /((2^p-1)(2^q-1)), where p>q are primes.

Table of values

List of values

cp's OEIS Frontend

A140803 Numbers of the form (2^(p*q)-1) /((2^p-1)*(2^q-1)), where p>q are primes.

Table of values

List of values

A140803 Numbers of the form (2^(pq)-1) /((2^p-1)(2^q-1)), where p>q are primes.