A023101 a(n) is least k such that k and 9k are anagrams in base n (written in base 10).

1089, 167580, 253638, 2499, 48893, 69034, 315, 6264, 2532609, 36, 14649, 12155, 819, 869, 16974, 39, 570375, 19773, 56322, 42, 1305, 43200, 2852, 59296, 1489686, 1649, 3465, 1809, 2791613, 152, 165165, 105, 5699, 6006, 322586, 256289, 4987125, 9108