1382958545

Appears in sequences

• Bell or exponential numbers: number of ways to partition a set of n labeled elements.at n=15A000110
• Bell Bell numbers: a(n+1) = B(a(n)), where B() are the Bell numbers, A000110.at n=3A061306
• Every third Bell number A000110.at n=5A070906
• Every fifth Bell number A000110.at n=3A070908
• Number of partitions of an n-element set that have at least one odd block.at n=14A089004
• Bisection of Bell numbers, A000110.at n=7A099977
• Sum of all n-digit Bell numbers.at n=9A133120
• Odd Bell numbers.at n=10A134715
• a(n) = A000110(2^n-1).at n=3A135084
• Number of set partitions of [n*(n-1)/2].at n=6A137736
• Number of palindromic structures of length n.at n=29A188164
• Number of palindromic structures of length n.at n=30A188164
• Denominator of Sum_{i=0..n-1} B(i)/B(n), where B(i) = A000110(i) are the Bell numbers.at n=15A192987
• Number of arrays of n 0..14 integers with new values introduced in order 0..14 but otherwise unconstrained.at n=14A203645
• Number of arrays of n 0..15 integers with new values introduced in order 0..15 but otherwise unconstrained.at n=14A203646
• Number of horizontal and antidiagonal neighbor colorings of the odd squares of an n X 3 array with new integer colors introduced in row major order.at n=10A216079
• Number of periodic palindromic structures of length n using an infinite alphabet.at n=29A285013
• Irregular triangle read by rows where T(n,k) is the number of multiset partitions of a multiset with d = A027750(n,k) copies of each integer from 1 to n/d.at n=41A322786
• Number of partitions of [n] having exactly one parity change within the partition.at n=31A363550