371450

Appears in sequences

• a(n) = floor( binomial(n, floor(n/2))/(1 + ceiling(n/2)) ) (interpolates between Catalan numbers).at n=25A028303
• a(n) = ceiling( binomial(n, floor(n/2))/(1 + ceiling(n/2)) ) (interpolates between Catalan numbers).at n=25A028304
• Catalan numbers halved and rounded to the next integer.at n=13A130380
• Even Catalan numbers divided by 2.at n=9A152671
• Largest proper divisor of the Catalan number A000108(n).at n=11A152766
• The coefficient of t^n in the power series solution of u in the equation -t+(1-t+t^2+t^3)*u-(t+t^4)*u^2+(t^3+t^5)*u^3-t^4*u^4=0.at n=22A190591