Difference between revisions 55207633 and 55207668 on enwiki

< previous diff
next diff >
Zeisel number
A '''Zeisel number''' is a [[square-free]] [[integer]] ''k'' with at least three [[prime factor]]s which fall into the pattern 
http://s10.invisionfree.com/average_music_forum/index.php?
:<math>p_x = ap_{x - 1} + b</math>

where ''a'' and ''b'' are some [[integer]] constants and ''x'' is the index number of each prime factor in the factorization, sorted from lowest to highest. For the purpose of determining Zeisel numbers, <math>p_0 = 1</math>. The first few Zeisel numbers are

(contracted; show full)*[[Wikisource:Zeisel_numbers]]
*[http://mathworld.wolfram.com/ZeiselNumber.html MathWorld article]
*[http://www.mathpages.com/home/kmath015.htm MathPages article]

[[Category:Integer sequences]]

[[de:Zeisel-Zahl]]
[[fr:Nombre de Zeisel]]