186300

Appears in sequences

• Triangle read by rows: T(n,c) = number of successive equalities in set partitions of n.at n=57A056857
• a(n) = C(n,2)*Bell(n-2) (cf. A000217, A000110).at n=10A105479
• Triangular array read by rows: T(n,k) is the number of blocks of size k in all set partitions of {1,2,...,n}.at n=46A175757
• Number of distinct (unordered) pairs of partitions of a 10-element set that have Rand distance n.at n=0A192103
• a(n) is the smallest nonnegative integer k where exactly n pairs of positive integers (x, y) exist such that x^2 + 11*y^2 = k.at n=15A374160
• Exponential abundant numbers that are not exponential unitary abundant.at n=26A391085
• Exponential Zumkeller numbers that are not exponential unitary Zumkeller numbers.at n=29A391090