2418025domain: NAppears in sequencesNumbers k that divide 6^k-1.at n=16A014946Squares which are palindromes in base 6.at n=14A029991a(n) = (n-1)*n^(n-2) + Sum_{i=1..n} (n-i)*(n^(n-i-1) + n^(n+i-3)).at n=4A068792Base-6 representation is the concatenation of the base-6 representations of 1, 2, ..., n, n-1, ..., 1.at n=5A260856