28102

Appears in sequences

• Fibonacci sequence beginning 4, 26.at n=16A022386
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 100 ones.at n=24A031868
• Expansion of 1/((1 - 2*x)*sqrt(1 - 4*x)).at n=8A082590
• Triangle T(n,k), read by rows, formed by setting all entries in the zeroth column ((n,0) entries) and the main diagonal ((n,n) entries) to powers of 2 with all other entries formed by the recursion T(n,k) = T(n-1,k) + T(n,k-1).at n=52A096466
• Reduced numerators of x^(2n) in the series expansion of erf(x)^2 Pi/4 about 0.at n=9A103979
• a(n) = [x^n] (1 + x*(1+x)^n )^n.at n=6A121674
• The A161671(n)-th partial sum of A161671.at n=40A161778
• Semiprimes that are the sum of the first n odd primes for some n.at n=35A274182