206000

Appears in sequences

• a(2n) = a(2n-1) + 2a(2n-2), a(2n+1) = a(2n) + a(2n-1), with a(1) = 2 and a(2) = 3.at n=19A001882
• Sum of the squares of the quadratic nonresidues of prime(n).at n=26A125617
• Numbers k such that k and k^2 use only the digits 0, 2, 3, 4 and 6.at n=30A136883