decompwlj 3D

Numbers n such that n^2 + 14 is prime

A121250 on the OEIS · family prime values

Weight–level plate of Numbers n such that n^2 + 14 is prime
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 viewerA121250 on the OEIS
Terms100,000 (n = 1 … 100,000)
Decomposable (a > 2d)99,996
Level class, k > L34,195 · 34.20 %
Weight class, k ≤ L65,801 · 65.80 %
Ties, k = L5
On the level line L = 11
Forced level, l ≤ d²76
Range of a(n)3 … 7,011,063
Range of the jump d6 … 798
Largest weight k, level L2,336,989, 999,183

105 different gaps occur, from 6 to 798; the level share is 34.20 %; L = 3 holds 48 % 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.