5368709120

Appears in sequences

• Expansion of (1+x)/(1-4*x).at n=16A003947
• a(n) = 5 * 2^n.at n=30A020714
• Fourth column of triangle A067410.at n=11A067412
• Expansion of g.f.: (1+x^2)/(1-2*x).at n=32A084215
• a(n) = Sum_{k=0..n} binomial(n+(-1)^k, k).at n=31A087940
• Start with the sequence [1, 1/2, 1/3, ..., 1/n]; form new sequence of n-1 terms by taking averages of successive terms; repeat until reach a single number F(n); a(n) = denominator of F(n).at n=29A090634
• An inverse Catalan transform of J(2n).at n=29A100335
• Binomial transform of A010685.at n=31A146523
• a(n) = 2*a(n-1) + 2^(n-1), for n > 0, with a(0)=6.at n=28A159694
• Index of first multiple of n-th prime in A005179.at n=26A161177
• Number of binary strings of length n with equal numbers of 001 and 100 substrings.at n=33A164143
• a(n) = 8*a(n-2) for n > 2; a(1) = 5, a(2) = 12.at n=20A164737
• Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^17 = I.at n=16A168682
• Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^18 = I.at n=16A168730
• Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^19 = I.at n=16A168778
• Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^20 = I.at n=16A168826
• Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^21 = I.at n=16A168874
• Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^22 = I.at n=16A168922
• Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^23 = I.at n=16A168970
• Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^24 = I.at n=16A169018