login
a(n)=(s(n)+3)/7, where s(n)=n-th base 7 palindrome that starts with 4.
0

%I #5 Jul 12 2012 00:39:47

%S 1,5,29,30,31,32,33,34,35,197,205,213,221,229,237,245,1373,1380,1387,

%T 1394,1401,1408,1415,1423,1430,1437,1444,1451,1458,1465,1473,1480,

%U 1487,1494,1501,1508,1515,1523,1530,1537,1544,1551

%N a(n)=(s(n)+3)/7, where s(n)=n-th base 7 palindrome that starts with 4.

%K nonn,base

%O 1,2

%A _Clark Kimberling_