The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #14 Jan 09 2024 16:10:23
%S 18,19,20,24,25,26,28,30,33,34,35,37,39,42,45,51,53,54,56,57,59,60,63,
%T 71,72,73,74,75,77,78,80,83,90,98,99,100,101,102,108,110,117,120,289,
%U 305,308,382,383,385,386,387,388,389,390,391,392,394,395,398,405,406,407,408,409,410
%N Numbers k such that (#1's in s(1),...,s(k)) = (#1's in r(1),...,r(k)), where s = A025142 and r = A025143.
%H Heiko Harborth editor, <a href="https://doi.org/10.1007/s005910050025">Probleme und Lösungen</a>, Mathematische Semesterberichte 44, pp. 93-96 (1997). See p. 94.
%K nonn
%O 1,1
%A _Clark Kimberling_