A043266 Sum of the digits of the n-th base 7 palindrome.
0, 1, 2, 3, 4, 5, 6, 2, 4, 6, 8, 10, 12, 2, 3, 4, 5, 6, 7, 8, 4, 5, 6, 7, 8, 9, 10, 6, 7, 8, 9, 10, 11, 12, 8, 9, 10, 11, 12, 13, 14, 10, 11, 12, 13, 14, 15, 16, 12, 13, 14, 15, 16, 17, 18, 2, 4, 6, 8, 10, 12, 14, 4, 6, 8, 10, 12, 14, 16, 6, 8, 10, 12, 14
Offset: 1
Crossrefs
A029954 (base 7 palindromes)