decompwlj 3D

Numbers congruent to {5,6,7,8,9,15,16,17,18,19} mod 25

A174138 on the OEIS · family residue class

Weight–level plate of Numbers congruent to {5,6,7,8,9,15,16,17,18,19} mod 25
Click the plate to explore it in 3-D. Weight k across, level L up, both on log scales: blue in the weight class (k ≤ L), orange in the level class (k > L). The dashed diagonal is k = L.
Open in the 3-D viewerA174138 on the OEIS
Terms100,000 (n = 1 … 100,000)
Decomposable (a > 2d)99,998
Level class, k > L12,491 · 12.49 %
Weight class, k ≤ L87,507 · 87.51 %
Ties, k = L37
On the level line L = 18,810
Forced level, l ≤ d²5
Range of a(n)5 … 249,994
Range of the jump d1 … 11
Largest weight k, level L249,989, 124,996

The gaps are 1, 6 and 11; the level share is 12.49 %; L = 1 holds 71 % 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.