|
%I #10 Jan 03 2013 03:38:10
%S 0,0,0,1,1,1,1,0,1,0,1,1,0,0,0,1,0,0,0,0,1,2,1,1,2,2,1,1,2,0,0,1,2,2,
%T 2,3,2,2,2,0,0,1,2,3,3,2,2,2,3,0,1,2,2,3,4,2,3,3,3,0,1,2,3,2,2,4,4,4,
%U 4,0,0,1,2,2,1,4,4,4,4,0,0,1
%N Number of bases in which both n and the reversal of n are 3-digit numbers.
%F a(n)=a(inv(n)); a(A002113(n))=A191291(A002113(n)); a(n)<=min(A191291(n),A191291(inv(n)).
%e a(36)=3 since 36 is 3-digit number in bases 4,5,6 and 63 is 3-digit number in bases 4,5,6,7 such that we have 3 common bases.
%Y Cf. A002113, A191291.
%K nonn,base
%O 1,22
%A _Vladimir Shevelev_, May 30 2011
|
