100137

Appears in sequences

• Suppose you take the ten digits 0..9, arrange them in any order and then either concatenate adjacent ones or separate them with a plus or minus sign, e.g., 98-76+5-4-32+10 or 9-8-765+3041-2. The first expression totals to "1", the second example totals to "2275". This sequence lists the positive integers that cannot be expressed in this way.at n=29A108224
• Least number that requires n steps to reach 0 by repeated application of f: x -> abs(x - reverse(x)).at n=20A109891
• Smallest number with n nonprime substrings (Version 1: substrings with leading zeros are considered to be nonprime).at n=16A213302