1846943453

Appears in sequences

• a(n) = 2^(2*n+1) - binomial(2*n+1, n+1).at n=15A000346
• Chvatal conjecture for radius of graph of maximal intersecting sets.at n=32A007008
• a(n) = 2^n - binomial(n, floor(n/2)).at n=31A045621
• a(n) = 2^(n-1) - ((1+(-1)^n)/4)*binomial(n, n/2).at n=32A058622
• Numerators of partial sums of Catalan numbers scaled by powers of 1/4.at n=15A120778
• 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=32A191391
• a(n) = 2^(n-1) + ((1+(-1)^n)/4)*binomial(n, n/2) - binomial(n, floor(n/2)).at n=32A294175