111111211

Appears in sequences

• Lunar squares n that can be written as n = i*i in more than one way.at n=9A180513
• Composite numbers whose product of digits is 2.at n=31A201015
• Over the alphabet {1,2} let A=111, B=211; sequence lists words A, B, AA, AB, BA, BB, AAA, AAB, ...at n=7A291797