112770domain: NAppears in sequencesMatrix log of triangle A111830, which shifts columns left and up under matrix 7th power; these terms are the result of multiplying each element in row n and column k by (n-k)!.at n=16A111833Numbers k such that k and k^2 use only the digits 0, 1, 2, 7 and 9.at n=46A136833