52768

Appears in sequences

• Expansion of (1-2x)^2/((1-x)^2(1-2x-x^2)^2).at n=12A108360
• a(n) is the number of integers x that can be written x = (2^c(1) - 2^c(2) - 3*2^c(3) - 3^2*2^c(4) - ... - 3^(m-2)*2^c(m) - 3^(m-1)) / 3^m for integers c(1), c(2), ..., c(m) such that n = c(1) > c(2) > ... > c(m) > 0 and c(1) - c(2) != 2 if m >= 2.at n=43A131450
• a(n) = n * A056219(n+1).at n=31A166869
• Poincaré series for hyperbolic reflection group with Coxeter diagram shown in Comments.at n=16A265051