1209312

Appears in sequences

• Number of sequences {s(i): i=0..n} such that |s(i)-s(i-1)|=1, i=1..n and s(i)=0 at four values of i, one of which is i=0.at n=22A052207
• Linear recursion with Catalan numbers.at n=10A053369
• Triangle read by rows: T(n,k) is the number of rooted maps with n edges whose core comprises k edges, 1 <= k <= n.at n=52A318106
• Number of nonisomorphic ordered triples of involutions on a (2n)-set that pairwise commute.at n=13A362904