122468

Appears in sequences

• a(n) = Sum_{k=0..n} (k+1) * Sum_{j=0..n} 2^j*binomial(n,j)*binomial(n-k,j).at n=7A035029
• Duplicate of A035029.at n=8A049607
• a(n) = 10000*n + 2468.at n=12A102689
• Number of nX4 0..1 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.at n=6A202975
• Number of n X 7 0..1 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.at n=3A202978
• T(n,k)=Number of nXk 0..1 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.at n=48A202979
• T(n,k)=Number of nXk 0..1 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.at n=51A202979
• Triangle read by rows, T(n, k) = (-1)^(n-k)*binomial(n,k)*hypergeom([k - n, n + 1], k + 1, 2), for n >= 0 and 0 <= k <= n.at n=47A297898