30152

Appears in sequences

• Numerator of 2*Sum(C(n,w)/(2*w+1),w=0..n/2-1)+C(n,n/2)/(n+1) if n is even, or of 2*Sum(C(n,w)/(2*w+1),w=0..(n-1)/2) if n is odd.at n=10A085568
• Column 4 of triangle A117418.at n=7A117422
• Triangle T, read by rows, formed by a column bisection of triangle A117418: column k of T equals column 2*k of A117418.at n=47A117425
• Number of integer partitions of n of whose permutations do not all have distinct runs.at n=39A351203
• Number of regions formed in a square by straight line segments when connecting the n+1 points along each edge that divide it into n equal parts to the n+1 points on the edge on the opposite side of the square.at n=11A355838
• Numbers k such that k^7*2^k - 1 is a prime.at n=16A367561