%I #13 May 17 2019 02:34:24

%S 0,1,2,3,3320,3321,3322,3323,112000,112001,112002,112003,121322,

%T 121330,211320,211321,211322,211323,320232,320302,321230,321301,

%U 322222,323221,323320,323321,323322,323323,10030333,20332101,30132120,30132121

%N Numbers n with property that n is a substring of its base 4 representation.

%H Giovanni Resta, <a href="/A038104/b038104.txt">Table of n, a(n) for n = 1..107</a> (terms < 10^16)

%e 323323 = base 10 -> 1032{323323} = base 4.

%Y Cf. A038102-A038106, A228050-A228052, A227549.

%K nonn,base

%O 1,3

%A _Patrick De Geest_, Feb 15 1999