Non-Niven (or non-Harshad) numbers that are divisible by 3
Open in the 3-D viewerA085371 on the OEIS
| Terms | 100,000 (n = 1 … 100,000) |
|---|---|
| Decomposable (a > 2d) | 99,999 |
| Level class, k > L | 8,270 · 8.27 % |
| Weight class, k ≤ L | 91,729 · 91.73 % |
| Ties, k = L | 1 |
| On the level line L = 1 | 1 |
| Forced level, l ≤ d² | 7 |
| Range of a(n) | 15 … 390,531 |
| Range of the jump d | 3 … 24 |
| Largest weight k, level L | 130,171, 97,632 |
7 different gaps occur, from 3 to 24; the level share is 8.27 %; L = 3 holds 97 % of the level class.
The decomposition
Every term of a strictly increasing sequence is written a(n) = k(n)·L(n) + d(n): the jump d = a(n+1) − a(n), the weight k the least divisor of a − d greater than d, the level L = (a − d)/k. A term decomposes when a > 2d; it is in the level class when k > L and in the weight class when k ≤ L. See decompwlj.com and arXiv:0711.0865, or how it works, with worked examples and a live one.