155400

Appears in sequences

• Number of exterior points formed by extending diagonals of n-gon in general position.at n=34A005701
• a(n) = (2*n-1)*(3*n-1)*(4*n-1).at n=19A033589
• Number of scalars which can be constructed from the Riemann tensor and metric tensor in n dimensions.at n=36A050297
• Numbers that can be expressed as the difference of the squares of primes in exactly nine distinct ways.at n=21A092005
• A sequence derived from pentagonal numbers, or a Stirling number of the first kind matrix.at n=36A094952
• a(n) = n*(n-1)*(n-2)*(n+3)/12.at n=37A117662
• Expansion of g.f.: (1+x^2)*(1+2*x^2)/(1-3*x+3*x^2-6*x^3+2*x^4-2*x^5).at n=12A123892