222122

Appears in sequences

• Numbers k such that sigma(k) = sigma(k+13).at n=22A015883
• k th digit of a(n) is the number of different digits within 3 of k (not including k).at n=21A039989
• k th digit of a(n) is the number of different digits within 4 of k (not including k).at n=20A039990
• Shortest (x+1,2x)-code of n.at n=35A233135
• Take n-th string over {1,2} in lexicographic order and apply the Watanabe tag system {00, 1011} described in A291067 (but adapted to the alphabet {1,2}) just once.at n=49A291072
• Trajectory of the word "211" under the Watanabe tag system {11, 2122} described in A291067 (adapted to the alphabet {1,2}).at n=3A291075