# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a146993 Showing 1-1 of 1 %I A146993 #13 Jan 27 2022 08:01:36 %S A146993 1,1,5,1,12,1,24,2,47,2,53,1,70,1 %N A146993 Number of terms in A145848 with exactly 2n decimal digits. %C A146993 It is shown by I. Bernshtein, see link, that a(2n+1)>=1 and 1<=a(2n)<=2. Thanks to Tanya Khovanova for this link. %H A146993 I. Bernshtein, Solution of problem M460. %Y A146993 Cf. A145848, A146991. %K A146993 more,nonn,base %O A146993 1,3 %A A146993 _Zak Seidov_, Nov 04 2008 %E A146993 Definition, comment, and a(11) corrected, and a(12)-a(14) added, by _Jon E. Schoenfield_, Nov 19 2008 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE