11112222

Appears in sequences

• a(n) = (1/9)*(10^(2*n) + 10^n - 2).at n=4A181718
• List of words over {1,2} with equal numbers of 1's and 2's.at n=28A214218
• List of minimal palindromic words over {1,2} that begin with 1, and have lengths 1, 2, 3, ....at n=17A225189
• Minimal representation (considered minimal in any canonical base b >= 3) of n in a binary system using two distinct digits "1" and "2", not allowing zeros, where a digit d in position p (p = 1,2,3,...,n) represents the value d^p.at n=33A235860
• Oblong (or pronic) numbers of the form x_n.y_n where z_n indicates the digit z repeated n times.at n=13A289980