35700

Appears in sequences

• Number of walks on square lattice.at n=16A005565
• Coefficients of Chebyshev polynomials.at n=13A005584
• Number of tree-rooted planar maps with 3 faces and n vertices and no isthmuses.at n=13A006470
• a(n) = T(4n,n), where T is the array defined in A025564.at n=5A025572
• Number of sublattices of index n in generic 4-dimensional lattice.at n=25A038991
• Triangle read by rows: matrix cube of the Stirling2 triangle A008277.at n=32A039811
• Triangle read by rows, the Bell transform of (n+2)!/2 without column 0.at n=32A046089
• a(n) = (4*n+1)*binomial(3*n,n)/(2*n+1).at n=6A052227
• Number of double tangents of order n.at n=17A060784
• Expansion of (1-3*x-sqrt(9*x^2-10*x+1))/(2*x).at n=6A082298
• Numbers k such that the three second-degree cyclotomic polynomials x^2 + 1, x^2 - x + 1 and x^2 + x + 1 are simultaneously prime when evaluated at x=k.at n=21A087277
• Least area of primitive Pythagorean triangle whose legs differ by A058529(n).at n=29A094143
• Total number of green nodes among tricolored labeled trees on n nodes.at n=6A097173
• Numbers k for which 2*k-1, 4*k-1, 8*k-1 and 16*k-1 are primes.at n=30A124494
• Row sums of triangle A134480.at n=34A134481
• a(n) = area of Pythagorean triangle with hypotenuse p, where p = A002144(n) = n-th prime == 1 (mod 4).at n=42A145010
• a(n) = 441*n^2 - 21.at n=8A145678
• Weight distribution of [255,55,63] primitive binary BCH code.at n=69A151934
• a(n) = 81n^2 - n.at n=20A157953
• a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 5.at n=25A160891