67125248

Appears in sequences

• Dirichlet convolution of b_n=2^(n-1) with itself.at n=25A034733
• Numbers n such that n + product of prime factors of n = (n+1) + product of prime factors of (n+1).at n=7A075655
• Numbers k such that A007947(k) = A007947(m+1) and A007947(m) = A007947(k+1), where k > m.at n=14A088966
• a(n) = n^5*(n^4 + 1)/2.at n=8A168372
• Number of -1..1 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having two or four distinct values for every i,j,k<=n.at n=24A211525
• a(2n) = 2a(n)+2^(2n), a(2n+1) = 2^(2n+1), a(0)=0.at n=26A227326
• a(n) = 4^n + 2^(n+1).at n=13A242985
• Number of monomials in c(n) where c(1) = x, c(2) = y, c(n+2) = c(n+1) + c(n)^2.at n=29A290075
• Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^(4^(k-1)).at n=13A344248
• Dirichlet g.f.: Product_{k>=2} (1 + k^(-s))^(4^(k-1)).at n=13A344267