32606domain: NAppears in sequencesNumbers k such that Sum_{j=1..k-1} j*2^(j-1) is prime.at n=12A119529a(n) = 49*n^2 - 20*n + 2.at n=25A157373The z^2 coefficients of the polynomials in the GF3 denominators of A156927 divided by 2.at n=5A157707Product of n and the sum of all divisors of all positive integers <= n.at n=33A256533