40116600

Appears in sequences

• Central binomial coefficients: binomial(2*n,n) = (2*n)!/(n!)^2.at n=14A000984
• a(n) = binomial(n, floor(n/2)).at n=28A001405
• a(n) = binomial(4n,2n) or (4*n)!/((2*n)!*(2*n)!).at n=7A001448
• Binomial coefficient C(28,n).at n=14A010944
• a(n) = binomial coefficient C(n,14).at n=14A010967
• Expansion of 1/(1-4*x)^(15/2).at n=7A020926
• a(n) = Sum_{i=0..floor(n/2)} T(i,n-i), array T as in A047072.at n=29A047074
• Swinging factorial, a(n) = 2^(n-(n mod 2))*Product_{k=1..n} k^((-1)^(k+1)).at n=28A056040
• Numerator of binomial(2n,n)/(2n+1).at n=14A056616
• Number of n-step walks on a line starting from the origin but not returning to it.at n=28A063886
• Binomial coefficient ( n, squarefree kernel(n) ).at n=27A073354
• Smallest integer of the form product (n+1)(n+2)...(n+k)/n!.at n=14A075055
• Expansion of 2sinh(x) + BesselI_0(2x).at n=28A081668
• Number of fixed points in range [A014137(n-1)..A014138(n-1)] of permutation A069772.at n=28A089849
• a(n) = Sum_{k = 0..n} binomial(n,floor(k/2))*(-1)^(n-k).at n=28A126869
• Inverse binomial transform of A005043.at n=28A126930
• Central binomial coefficients C(2k,k) repeated.at n=28A128014
• Central binomial coefficients C(2k,k) repeated.at n=29A128014
• Expansion of (1+x)/sqrt(1+4x^2).at n=28A128057
• Expansion of (1+x)/sqrt(1+4x^2).at n=29A128057