1000020

Appears in sequences

• Liponombres: numbers whose French name does not contain the letter "e".at n=20A014254
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 100.at n=19A031778
• Suburban numbers: without b, r, s or u.at n=47A072955
• a(n+1) is the least integer > a(n) containing all digits of a(n); a(1)=2.at n=32A155890
• Sum of any three adjacent digits of n^2 is a square.at n=49A174397
• Concatenate the positions of digits 9, 8,..., 0 in the decimal representation of n, using 1 for the rightmost digit etc., and 0 when the digit does not occur.at n=16A260521