262010

Appears in sequences

• a(n) = Sum_{k=0..n}((binomial(2*k,k)/(k+1)*binomial(2*n+2,n-k))).at n=8A270530
• Array read by antidiagonals: T(n,k) = number of n X k lonesum decomposable (0,1) matrices of decomposition order 2.at n=59A299905
• Array read by antidiagonals: T(n,k) = number of n X k lonesum decomposable (0,1) matrices of decomposition order 2.at n=61A299905
• Number of vertices in regular n-gon after 2 generations of mitosis.at n=32A349967