cp's OEIS Frontend

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.

A139104 Numbers whose binary representation shows the distribution of prime numbers up to the n-th prime, using "0" for primes and "1" for nonprime numbers.

Table of values

n a(n)
1 2
2 4
3 18
4 74
5 1198
6 4794
7 76718
8 306874
9 4909998
10 314239934
11 1256959738
12 80445423294
13 1287126772718
14 5148507090874
15 82376113453998
16 5272071261055934
17 337412560707579838
18 1349650242830319354
19 86377615541140438718
20 1382041848658247019502
21 5528167394632988078010

List of values

[2, 4, 18, 74, 1198, 4794, 76718, 306874, 4909998, 314239934, 1256959738, 80445423294, 1287126772718, 5148507090874, 82376113453998, 5272071261055934, 337412560707579838, 1349650242830319354, 86377615541140438718, 1382041848658247019502, 5528167394632988078010]

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

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