212576domain: NAppears in sequencesNumber of walks on cubic lattice.at n=25A005571Positive integers with the property that if the base-3 representation is reversed the result is twice the original number.at n=15A173951a(n) = ADP(n) is the total number of aperiodic k-double-palindromes of n, where 2 <= k <= n.at n=26A181135