decompwlj 3D

Primes of the form 36n + 1

A093838 on the OEIS · family primes

Weight–level plate of Primes of the form 36n + 1
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 viewerA093838 on the OEIS
Terms100,000 (n = 1 … 100,000)
Decomposable (a > 2d)99,997
Level class, k > L47,291 · 47.29 %
Weight class, k ≤ L52,706 · 52.71 %
Ties, k = L39
On the level line L = 115,604
Forced level, l ≤ d²232
Range of a(n)37 … 18,834,913
Range of the jump d36 … 1,548
Largest weight k, level L18,834,841, 507,745

41 different gaps occur, from 36 to 1,548; the level share is 47.29 %; L = 1 holds 33 % 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.