Noun
Zeisel number (plural Zeisel numbers)
A squarefree integer with at least three prime factors which fall into the pattern
p
x
=
a
p
x
−
1
+
b
{\displaystyle p_{x}=ap_{x-1}+b}
, 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.