4426065

Appears in sequences

• Convolution of A001147 (double factorial numbers) with itself.at n=8A034430
• Triangle read by rows: T(n,k) is the number of linear chord diagrams on 2n vertices with one marked chord such that exactly k of the remaining n-1 chords are excluded by (i.e., are outside and do not contain) the marked chord.at n=44A336601