171106

Appears in sequences

• Form array in which n-th row is obtained by expanding (1+x+x^2)^n and taking the 2nd column from the center.at n=11A014531
• T(n,k)=Number of length n+k 0..3 arrays with at most two downsteps in every k consecutive neighbor pairs.at n=36A255660
• Number of length n+1 0..3 arrays with at most two downsteps in every n consecutive neighbor pairs.at n=8A255661
• Number of n X 1 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.at n=11A278365
• Irregular triangle read by rows: T(n,m) = number of lattice paths of type A^H terminating at point (n, m).at n=44A291081
• a(n) = sum of the origin-to-boundary graph-distances of all partitions of n.at n=39A368986