2122221

Appears in sequences

• k th digit of a(n) = number of different digits within 2 places of k (not including k).at n=29A039987
• k th digit of a(n) is the number of different digits within 3 of k (not including k).at n=29A039989
• k th digit of a(n) is the number of different digits within 4 of k (not including k).at n=26A039990
• List of Nyldon words over {1,2}.at n=39A328073