900000001

Appears in sequences

• Numbers k such that k^2 contains only digits {0,1,8}, not ending with zero.at n=22A058421
• Smallest n-digit squarefree number beginning with n.at n=8A077513
• First n-digit number that occurs in the sequence A085951.at n=8A085952
• Number of times 1 is used in writing out all numbers 1 through 10^n.at n=9A094797
• a(1) = 1; a(n) is the smallest natural number such that a(n) > a(n-1), and the name of a(n) in English starts with the letter a(n-1) ends with, and a(n) makes the sequence extendable.at n=24A281067