4213597

Appears in sequences

• Bell or exponential numbers: number of ways to partition a set of n labeled elements.at n=12A000110
• Number of oriented multigraphs on n labeled arcs (with loops).at n=6A020557
• Every third Bell number A000110.at n=4A070906
• Every fourth Bell number A000110.at n=3A070907
• Numerator of coefficients of power series for exp(exp(x)-1).at n=12A076903
• Sum of all n-digit Bell numbers.at n=6A133120
• Odd Bell numbers.at n=8A134715
• Triangle T(n,k), n>=1, 1<=k<=n, read by rows, where sequence a_k of column k has a_k(0)=1, followed by (k-1)-fold 0 and a_k(n) shifts k places down under binomial transform.at n=66A143983
• Triangle, A000110 in every column > 0, shifted down twice.at n=42A173108
• Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k nonincreasing cycles (0<=k<=floor(n/3)). A cycle (b(1), b(2), ...) is said to be increasing if, when written with its smallest element in the first position, it satisfies b(1) < b(2) < b(3) < ... .at n=30A186756
• Number of palindromic structures of length n.at n=23A188164
• Number of palindromic structures of length n.at n=24A188164
• Number of set partitions of {1, ..., n} that avoid 7-nestings.at n=12A192128
• Number of set partitions of {1, ..., n} that avoid enhanced 7-crossings (or enhanced 7-nestings).at n=12A192867
• Denominator of Sum_{i=0..n-1} B(i)/B(n), where B(i) = A000110(i) are the Bell numbers.at n=12A192987
• Number of arrays of n 0..11 integers with new values introduced in order 0..11 but otherwise unconstrained.at n=11A203642
• Number of arrays of n 0..12 integers with new values introduced in order 0..12 but otherwise unconstrained.at n=11A203643
• Number of arrays of n 0..13 integers with new values introduced in order 0..13 but otherwise unconstrained.at n=11A203644
• Number of arrays of n 0..14 integers with new values introduced in order 0..14 but otherwise unconstrained.at n=11A203645
• Number of arrays of n 0..15 integers with new values introduced in order 0..15 but otherwise unconstrained.at n=11A203646