7423131482

Appears in sequences

• a(n) = 2^(2*n+1) - binomial(2*n+1, n+1).at n=16A000346
• Chvatal conjecture for radius of graph of maximal intersecting sets.at n=34A007008
• Number of horizontal segments in all dispersed Dyck paths of length n (i.e., in all Motzkin paths of length n with no (1,0)-steps at positive heights; a horizontal segment is a maximal sequence of consecutive (1,0)-steps).at n=34A191391
• a(n) = 2^(n-1) + ((1+(-1)^n)/4)*binomial(n, n/2) - binomial(n, floor(n/2)).at n=34A294175