47658

Appears in sequences

• Number of irreducible binary polynomials Sum_{j=0..n} c(j)*x^j with c(1)=c(n-1)=1.at n=21A175390
• Number of (w,x,y,z) with all terms in {0,...,n} and |w-x|+|x-y+|y-z|=n.at n=37A212904
• Certain directed lattice paths.at n=6A260770
• a(n) = 2*n*(16*n - 13).at n=39A263228
• Number of n-step self-avoiding walks on the Manhattan lattice with no non-contiguous adjacencies.at n=22A336662
• Numbers k such that sigma(k) = psi(k) + tau(k)^2.at n=40A390296