Bell number
Bell number
Count of the possible partitions of a set.
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Readers' pathsAug 2026 – Oct 2026
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Stirling numbers of the second kind
Numbers parameterizing ways to partition a set.
11%
Partition of a set
Mathematical ways to group elements of a set.
10%
Eric Temple Bell
Scottish-born mathematician and science fiction writer.
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Catalan number
Recursive integer sequence.
6.2%
Bell triangle
Triangle of numbers.
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Pell number
Number used to approximate the square root of 2.
5%
Ordered Bell number
Number of orderings allowing ties.
4.1%
Touchard polynomials
Sequence of polynomials.
3%
On-Line Encyclopedia of Integer Sequences
Online database of integer sequences.
3%
Combinatorics
Branch of discrete mathematics.
2.1%
Readers come from
Share of the 2,123 readers arriving from another article
Stirling numbers of the second kind
Numbers parameterizing ways to partition a set.
13%
52 (number)
Natural number.
11%
Partition of a set
Mathematical ways to group elements of a set.
11%
Catalan number
Recursive integer sequence.
7.3%
Taylor series
Mathematical approximation of a function.
5.4%
Equivalence relation
Mathematical concept for comparing objects.
5.3%
Integer sequence
Ordered list of whole numbers.
3.7%
Pell number
Number used to approximate the square root of 2.
2.8%
15 (number)
Natural number.
2.4%
Derangement
Type of permutation of a set of elements.
1.7%