209295260

Appears in sequences

• T(2n+1,n), array T as in A054110.at n=14A054114
• a(n) = Sum_{i=1..n} binomial(2*i,i).at n=14A066796
• a(n) = Sum_{k=1..n^2-1} binomial(2k,k).at n=3A147291