52169

Appears in sequences

• Numerator of 2*Sum(C(n,w)/w,w=1..n/2-1)+C(n,n/2)/(n/2) if n is even otherwise of 2*Sum(C(n,w)/w,w=1..(n-1)/2).at n=11A085571
• Row sums of number triangle A114280.at n=17A114281