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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.

A128959 a(n) is equal to the number of positive integers m less than or equal to 10^n such that m is not divisible by at least one of the primes 2,3 and is not divisible by at least one of the primes 5,7.

Table of values

n a(n)
2 82
3 810
4 8096
5 80953
6 809524
7 8095239
8 80952382
9 809523810
10 8095238096
11 80952380953
12 809523809524
13 8095238095239
14 80952380952382
15 809523809523810
16 8095238095238096
17 80952380952380953
18 809523809523809524
19 8095238095238095239
20 80952380952380952382

List of values

[82, 810, 8096, 80953, 809524, 8095239, 80952382, 809523810, 8095238096, 80952380953, 809523809524, 8095238095239, 80952380952382, 809523809523810, 8095238095238096, 80952380952380953, 809523809523809524, 8095238095238095239, 80952380952380952382]

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

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