88987domain: NAppears in sequencesNumbers k such that k and k^2 use only the digits 1, 6, 7, 8 and 9.at n=13A137065Number of nondecreasing strings of numbers x(i=1..8) in -n..n with sum x(i)^3 equal to 0.at n=24A188282L.g.f.: Sum_{n>=1} (x^n/n) / Product_{d|n} (1 - d*x^n).at n=26A198299