27324

Appears in sequences

• Number of exterior points formed by extending diagonals of n-gon in general position.at n=21A005701
• Percolation series for hexagonal lattice.at n=20A006803
• Number of scalars which can be constructed from the Riemann tensor and metric tensor in n dimensions.at n=23A050297
• Triangle read by rows: T(n,k) (n >= 2, k >= 0) is the number of non-crossing connected graphs on n nodes on a circle, having k interior faces. Rows are indexed 2,3,4,...; columns are indexed 0,1,2,....at n=33A089434
• a(n) = n*(n-1)*(n-2)*(n+3)/12.at n=24A117662
• a(n) = 6 + floor( Sum_{j=1..n-1} a(j)/4 ).at n=38A120164
• Triangle read by rows: T(n,k) (n >= 2, 1 <= k <= 2n-3) is the number of non-crossing connected graphs on n nodes on a circle, having k edges. Rows are indexed 2,3,4,...; columns are indexed 0,1,2,....at n=61A127537
• G.f.s of the z^p coefficients of the polynomials in the GF3 denominators of A156927.at n=10A157704
• a(n) is the smallest positive number such that a(n)*n is an anagram of a(n)*4.at n=32A175693
• a(n) = Sum_{k=0..n} k^2 * A000041(k).at n=12A259279
• Expansion of Product_{k>=1} ((1 + 4*x^k) / (1 - 4*x^k))^(1/2).at n=8A303392
• Those primitive elements of A337386 that have exactly one primitive nondeficient divisor (A006039).at n=9A341604
• Number of locally disjoint ordered rooted trees with n nodes.at n=11A358460