2212212

Appears in sequences

• Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 2,2,1.at n=6A037567
• k th digit of a(n) = number of different digits within 2 places of k (not including k).at n=30A039987
• Last block of length-n to appear for the first time in the Kolakoski sequence K (A000002).at n=6A283512
• Number of nX3 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 2 or 3 neighboring 1s.at n=9A296583