7455630domain: NAppears in sequencesA084175 interleaved with 2*A084175.at n=25A138477Number of degree n polynomials f with all nonzero coefficients equal to 1 such that f(k) is divisible by 3 for all integers k.at n=26A329479Totients congruent to 2 mod 4 and that have multiplicity 4.at n=32A334839