143078

Appears in sequences

• Even numbers of the form floor( binomial(2k, 2j)/binomial(k, j)).at n=27A111304
• Principal diagonal of the convolution array A213505.at n=11A213546
• Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically.at n=10A253691
• a(n) = Sum_{k=1..floor(n/2)} k^2 * (n-k)^2.at n=23A337173