142682domain: NAppears in sequences(2*numerator(H(p-3)) -3*denominator(H(p-3)))/p with H(m) = 1 + 1/2 + 1/3 + ...+ 1/m.at n=6A091817a(n) is the 2^n-th semiprime.at n=15A131867Numbers n such that n^32+1 and (n+2)^32+1 are both prime.at n=36A217992a(n) = floor(4^n/((1+sqrt(5))/2)^(2*n)).at n=28A240523