348502

Appears in sequences

• Second elementary symmetric function of the first n terms of (1,2,4,8,...).at n=8A203241
• Number of set partitions of [n] into exactly four blocks such that all odd elements are in blocks with an odd index and all even elements are in blocks with an even index.at n=17A274868
• a(n) = Sum_{k=0..floor(3*n/11)} binomial(3*n-10*k,k).at n=27A392350