74614

Appears in sequences

• Triangular array associated with Schroeder numbers.at n=53A033878
• Inverse of the Delannoy triangle.at n=46A103136
• Second column of inverse of Delannoy triangle.at n=9A103138
• Riordan array ((1-x+sqrt(1+6*x+x^2))/2, (sqrt(1+6*x+x^2)-x-1)/2).at n=57A112477
• T(n, k) counts Schroeder n-paths whose ascent starting at the initial vertex has length k. Triangle T(n,k), read by rows.at n=46A132372
• 1/16 the number of (n+1) X 7 0..3 arrays with all 2 X 2 subblocks having the same four values.at n=13A184036
• Irregular triangle read by rows: T(n,k) is the number of simple connected graphs on n nodes with radius k, (0 <= k <= floor(n/2)).at n=32A324239
• Expansion of 1/sqrt( (1-x) * (1-x-4*x^3)^3 ).at n=15A383503