291399domain: NAppears in sequencesNumbers k such that sopf(k) = sopf(k^2 - 1), where sopf(k) = A008472(k).at n=24A064019a(n) is the least positive integer such that the integer part of the arithmetic-geometric mean of a(n) and 1 is equal to 2^n.at n=15A090855Row sums of the triangle A105160.at n=33A105157