196119

Appears in sequences

• Number of distributive lattices; also number of paths with n turns when light is reflected from 11 glass plates.at n=6A030115
• a(n) = (n+1)*(n+2)*(61*n^4 + 366*n^3 + 845*n^2 + 888*n + 360)/720.at n=10A108675
• Convolution of nonzero squares (A000290) with nonzero pentagonal numbers (A000326).at n=19A271663