Forced divisor · 9 sequences
The sequences of the family “forced divisor”, by A-number, with the share of their decomposable terms in the level class (k > L).
- primes · 1717
- polynomial · 1232
- quadratic form · 430
- prime values · 423
- residue class · 357
- digit rule · 306
- multiplicative · 199
- Beatty · 86
- divisor functions · 58
- binary rule · 48
- self-referential · 35
- complement · 23
- powers · 22
- summatory · 21
- arithmetic progression · 10
- smooth · 10
- forced divisor · 9
- sieve · 8
- block · 5
- base case · 1
| A-number | Name | Level |
|---|---|---|
| A001651 | Numbers not divisible by 3 | 0.0 % |
| A005408 | The odd numbers: a(n) = 2*n + 1 | 18.0 % |
| A007310 | Numbers congruent to 1 or 5 mod 6 | 9.6 % |
| A007775 | Numbers not divisible by 2, 3 or 5 | 13.6 % |
| A008364 | 11-rough numbers: not divisible by 2, 3, 5 or 7 | 14.7 % |
| A008365 | 13-rough numbers: positive integers that have no prime factors less than 13 | 15.5 % |
| A008366 | Smallest prime factor is >= 17 | 16.2 % |
| A008585 | a(n) = 3*n | 9.6 % |
| A047201 | Numbers not divisible by 5 | 10.4 % |