91124domain: NAppears in sequencesNumber of irreducible binary polynomials Sum_{j=0..n} c(j)*x^j with c(1)=c(n-1)=1.at n=22A175390Cubefree numbers n such that n + 1 is a perfect cube.at n=33A268861a(n) = n^3 - (n mod 2).at n=44A301647