805414

Appears in sequences

• Number of (n+2) X (2+2) 0..2 arrays with each row and column divisible by 11, read as a base-3 number with top and left being the most significant digits.at n=7A263331
• T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with each row and column divisible by 11, read as a base-3 number with top and left being the most significant digits.at n=37A263333
• a(n) = Sum_{k=0..n} 2^(n-k) * binomial(2*n+1,k) * binomial(2*n-k,n-k).at n=6A385514