101813

Appears in sequences

• a(n) = floor( n*(n-1)*(n-2)*(n-3)/32 ).at n=44A011942
• Smallest integral ladder whose ends slide over the respective distances 1 and m=2*n+1 while slipping down along horizontal ground and vertical wall against which it leans.at n=7A094081
• Quasi-Carmichael numbers to at least one negative base and at least one positive base.at n=19A257759
• Number of (undirected) paths in the n-gear graph.at n=16A292000