100045

Appears in sequences

• Number of integers <= 2^n of form 4 x^2 + 4 x y + 5 y^2.at n=20A000076
• Positive numbers k such that k and 5*k are anagrams in base 6 (written in base 6).at n=6A023067
• 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=16A108224
• Array read by antidiagonals: see A128195 for details.at n=40A126062