72180

Appears in sequences

• Number of (1,0)-steps on the lines y=0 and y=1 in all Schroeder paths of length 2n (a Schroeder path of length 2n is a path from (0,0) to (2n,0), consisting of steps U=(1,1), D=(1,-1) and H=(2,0) and never going below the x-axis).at n=8A110190
• Icosagonal numbers divisible by 20.at n=18A117798
• Number of partitions of n-set with 3 block sizes.at n=4A133118
• Triangular array read by rows: T(n,k) is the number of set partitions of {1,2,...,n} that have exactly k distinct block sizes.at n=22A208437