29920

Appears in sequences

• Longest edge a of smallest (measured by the longest edge) primitive Euler bricks (a, b, c, sqrt(a^2 + b^2), sqrt(b^2 + c^2), sqrt(a^2 + c^2) are integers).at n=35A031173
• Jacobi form of weight 12 and index 1 for Niemeier lattice of type A_15 D_9.at n=7A055753
• Row sums of triangle A134480.at n=32A134481
• 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=51A142701
• a(n) = 4*(4 + 9*n^2 + 15*n).at n=28A144449
• a(n) = A061039(8*n+5).at n=21A144453
• Row sums of triangle A144825.at n=43A144826
• Terms of A061039 that are multiple of 10, in the order in which they appear.at n=34A146762
• a(n) = A016755(n) - A001845(n).at n=16A188050
• Number of 4-element subsets that can be chosen from {1,2,...,4*n} having element sum 8*n+2.at n=26A204468
• Number of partitions of n such that no part is a prime divisor of n.at n=46A237125
• Sum_{k, k|n} 2^(k-1) + Sum_{1<=k<=n, gcd(k,n)=1} 2^(k-1).at n=14A245392
• Number of free pure identity multifunctions with one atom and n positions.at n=17A317877
• Where the number of divisors d(k) reaches a new record for numbers k whose prime factors are of the form 3*j+2.at n=21A326312
• Number of n-step self-avoiding walks on a square lattice where no step can be in the same direction as the previous step.at n=19A337353
• Numbers of the form ab such that uphi(ab) = a*b where ab is the concatenation of a and b.at n=31A337523
• Place two n-gons with radii 1 and 2 concentrically, forming an annular area between them. Connect all the vertices with line segments that lie entirely within that area. Then a(n) is the number of regions in that figure.at n=29A337700
• Irregular triangle read by rows where T(n,k) is the number of independent sets of size k in the n-hypercube graph.at n=30A354802