A339594 - OEIS

%I #3 Jan 02 2021 11:51:18

%S 0,4,9,12,25,9,49,16,27,25,121,13,169

%N Two-dimensional Kempner (or Kempner-Smarandache) numbers.

%H Norbert Hungerbühler, Ernst Specker, <a href="http://www.emis.de/journals/INTEGERS/papers/g23/g23.Abstract.html">A generalization of the Smarandache Function to several variables</a>, INTEGERS 6 (2006) #A23

%Y Cf. A002034, A339595, A339596.

%K nonn,more

%O 1,2

%A _N. J. A. Sloane_, Jan 02 2021