54528

Appears in sequences

• Generalized Catalan numbers 4*x*A(x)^2 -A(x)+1-3*x=0.at n=6A068766
• Eight white kings and one red king on a 3 X 3 chessboard. G.f.: (1 + 2*x - 4*x^2)/(1 - 2*x - 8*x^2).at n=8A179607
• Numbers of the form p^8*q*r where p, q, and r are distinct primes.at n=36A179747
• Number of (n+1)X8 0..2 arrays with every 2X3 or 3X2 subblock having exactly one clockwise edge increases.at n=7A207049
• Numbers n such that the products n*(sum of the reciprocals of the Collatz (3x+1) sequence beginning at n) are integers.at n=44A225878
• Integers that are Rhonda numbers to base 18.at n=15A255735
• Number of compositions (ordered partitions) of n into primes of form x^2 + y^2 (A002313).at n=52A282971
• Integers m that satisfy tau(m) + omega(m) = #({phi(x) = m}).at n=26A305656