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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A081093 a(n) is the smallest prime such that the number of 1's in its binary expansion is equal to the n-th prime.

Table of values

n a(n)
1 3
2 7
3 31
4 127
5 3583
6 8191
7 131071
8 524287
9 14680063
10 1073479679
11 2147483647
12 266287972351
13 4260607557631
14 17591112302591
15 246290604621823
16 17996806323437567
17 1152917106560335871
18 2305843009213693951

List of values

[3, 7, 31, 127, 3583, 8191, 131071, 524287, 14680063, 1073479679, 2147483647, 266287972351, 4260607557631, 17591112302591, 246290604621823, 17996806323437567, 1152917106560335871, 2305843009213693951]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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