111612119056domain: NAppears in sequencesNumber of n-digit palindromes in base n.at n=15A099767a(n) = phi(n^9), where phi = A000010.at n=16A239443a(n) = n^9 - n^8.at n=17A240932Sequence related to chains in type D noncrossing partitions.at n=15A363861