23279256

Appears in sequences

• a(n) = (1/C(2n,0) - 1/C(2n,1) + ... + d/C(2n,2n))*L, where d = (-1)^2n, L = LCM{C(2n,0), C(2n,1),..., C(2n,2n)}.at n=9A025535
• Triangle of Stirling numbers of order 6.at n=23A059025
• Denominator of n*sum(k=1,(-1)^(k+1)/(n+k)).at n=9A082690
• a(n) = binomial(2n+1, n+1)*binomial(n+2, 2).at n=10A085373
• a(n) = C(n+5,5)*C(n+10,5).at n=9A104679
• a(n) = C(4+2*n,4+n)*C(9+2*n,0+n).at n=5A114252
• Denominators of partial sums of the alternating series of inverse central binomial coefficients.at n=9A145556
• a(n) = 288*binomial(2*n,n-5) + 8*Sum_{i=1..n-5} binomial(2*n,n-5-i)*(5+i).at n=11A182026
• Number of nX1 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to two or fewer horizontal or vertical neighbors.at n=18A199094
• Denominator of partial sums of a reordered alternating harmonic series.at n=14A262022
• Denominator of partial sums of a reordered alternating harmonic series.at n=15A262022
• Denominator of n*Sum_{k=1..n} 1/(n+k).at n=9A296519
• a(n) is the denominator of the rational part of Sum_{k>=n} binomial(2*k,k-n)^(-1).at n=11A309001
• Triangle read by rows, expansion of the e.g.f. given below related to partitions of {1,2,...,5n} into sets of size 5, nonzero coefficients of z.at n=13A318257
• Denominator of the sum of all elements of the n X n matrix M with M[i,j] = (-1)^(i+j)*i/j for i,j = 1..n.at n=18A334724
• Denominator of the sum of all elements of the n X n matrix M with M[i,j] = (-1)^(i+j)*i/j for i,j = 1..n.at n=19A334724
• Maximum number of inequivalent permutations of a partition of n, where two permutations are equivalent if they are reversals of each other.at n=32A361223