28864

Appears in sequences

• High-temperature expansion of Ising model susceptibility chi_2 for square lattice.at n=5A010039
• a(n) is the number of (s(0),s(1),...,s(n)) such that every s(i) is a nonnegative integer, s(0) = 1, s(n) = 1, |s(1) - s(0)| = 1, |s(i) - s(i-1)| <= 1 for i >= 2. Also a(n) = T(n,n), where T is the array in A026120.at n=10A026122
• Jacobi form of weight 12 and index 1 for the Niemeier lattice of type D_12^2.at n=7A055750
• a(n) = 8^n mod 6^n.at n=6A138964
• A triangular sequence of coefficients made from a product sum of the Pascal/binomial and the Chebyshev T Polynomials: t(n,m)=-Sum[Binomial[n + 1, k + 1]*CoefficientList[ChebyshevT[k + 1, x], x][[m]], {k, m, n}].at n=52A142701
• a(n) = n*(n+1)*(5*n + 4)/6.at n=32A162147
• a(n) = r1^n + r2^n + r3^n where r1, r2, r3 are the three roots of x^3 - 2*x - 2 = 0.at n=17A191697
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 30", based on the 5-celled von Neumann neighborhood.at n=28A285538
• Number of distinct terms in row n of A049455.at n=23A293165
• a(n) = Sum_{k=0..floor(n/2)} 2^k * binomial(2*k+1,2*n-4*k+1).at n=13A387768