9961491domain: NAppears in sequencesa(n) = n*(2^n + 1).at n=19A069229Numbers k such that k^3 divides 2^(k^2)+1.at n=4A127263Numbers k such that k^3 divides 8^(k^2) + 1.at n=18A128681Numbers k such that k^2 divides 8^k + 1.at n=8A292333