7020405

Appears in sequences

• a(n) = 3*(2*n)!/((n+2)!*(n-1)!).at n=14A000245
• a(n) = T(n, floor(n/2)), where T = Catalan triangle (A008315).at n=27A026008
• a(n) = 3*binomial(2n, n-1)/(n+2), n > 0, with a(0)=1.at n=14A071724
• Lexicographically earliest sequence of distinct positive integers with no finite subset summing to a Catalan number (A000108).at n=38A353983
• Arises from enumeration of a certain class of partial zig-zag knight's paths on the square grid.at n=27A368379