165927
domain: N
Appears in sequences
- Number of pairs of intersecting diagonals in the exterior of a regular n-gon.at n=38A211381
- Number of intersections of diagonals in the exterior of a regular n-gon.at n=38A211382
- Squarefree numbers k such that alpha(k) = lambda(k), where alpha(k) = LCM of all (p+1) for primes p dividing k, and lambda(k) = A002322(k).at n=19A287514