Hi Hans, I've seen you have created the sequence A204047 of minimal k-persistent numbers (in the strict sense, i.e., a number is k-persistent if it has persistency up to k but not k+1). I've added the entries from a(7)=153846076923 to a(16)=201062849735918. Since a number cannot be 9-persistent, I have set a(9)=0. Giovanni Resta