decompwlj 3D

Primes of form x^2+83*y^2

A033253 on the OEIS · family quadratic form

Weight–level plate of Primes of form x^2+83*y^2
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 viewerA033253 on the OEIS
Terms100,000 (n = 1 … 100,000)
Decomposable (a > 2d)99,998
Level class, k > L44,128 · 44.13 %
Weight class, k ≤ L55,870 · 55.87 %
Ties, k = L4
On the level line L = 17,960
Forced level, l ≤ d²478
Range of a(n)83 … 29,037,977
Range of the jump d2 … 3,378
Largest weight k, level L29,035,907, 9,678,835

1,009 different gaps occur, from 2 to 3,378; the level share is 44.13 %.

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.