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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.

A128954 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 the prime 2 and is not divisible by at least one of the primes 3, 5 and 7.

Table of values

n a(n)
2 50
3 495
4 4952
5 49524
6 495238
7 4952381
8 49523810
9 495238095
10 4952380952
11 49523809524
12 495238095238
13 4952380952381
14 49523809523810
15 495238095238095
16 4952380952380952
17 49523809523809524
18 495238095238095238

List of values

[50, 495, 4952, 49524, 495238, 4952381, 49523810, 495238095, 4952380952, 49523809524, 495238095238, 4952380952381, 49523809523810, 495238095238095, 4952380952380952, 49523809523809524, 495238095238095238]

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

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