145422675

Appears in sequences

• a(n) = binomial coefficient C(2n, n-1).at n=15A001791
• Numerators in expansion of (1 - x)^(-3/2).at n=14A001803
• a(0) = 1; thereafter a(n) = denominator of (n-2)!! / (n-1)!!.at n=30A004731
• Denominator of average distance traveled by n-dimensional fly.at n=27A004735
• Valence of graph of maximal intersecting families of sets.at n=29A007007
• Binomial coefficient C(30,n).at n=14A010946
• Binomial coefficient C(30,n).at n=16A010946
• a(n) = binomial coefficient C(n,14).at n=16A010967
• a(n) = binomial(n,16).at n=14A010969
• a(n) = number of (s(0), s(1), ..., s(n)) such that s(i) is a nonnegative integer and |s(i) - s(i-1)| = 1 for i = 1,2,...,n and s(0) = 3. Also a(n) = Sum{T(n,k), k = 0,1,...,[ (n+3)/2 ]}, where T is defined in A026022.at n=28A026023
• a(n) = binomial(n, floor((n-1)/2)).at n=30A037952
• a(n) = binomial(n, floor(n/2)-1).at n=30A037955
• Numerator of mean deviation of a symmetrical binomial distribution on n elements.at n=28A086116
• Numerator of mean deviation of a symmetrical binomial distribution on n elements.at n=29A086116
• a(0) = 1; for n>0, if gcd(a(n-1),n) = 1 then a(n) = n*a(n-1) else a(n) = least integer multiple of a(n-1)/n.at n=29A094299
• Triangle read by rows: T(n,m) = number of m-block proper covers (without empty blocks and without multiple blocks) of a labeled n-set (n>=2, 2<=m<=2^n-2).at n=33A095421
• Triangle read by rows: T(n,m) = number of m-block proper T_0-covers (without empty blocks and without multiple blocks) of a labeled n-set (n>=2, 2<=m<=2^n-2).at n=33A095422
• a(n) = binomial(2*binomial(2*n,n-1),binomial(2*n,n-1)-1).at n=2A101355
• Expansion of (1+x)c(x^2)/((1-x^2*c(x^2))sqrt(1-4x^2)), c(x) the g.f. of A000108.at n=28A117187
• Expansion of (1+x)c(x^2)/((1-x^2*c(x^2))sqrt(1-4x^2)), c(x) the g.f. of A000108.at n=29A117187