30720

Appears in sequences

• Theta series of P_{12a} packing.at n=5A005952
• Number of 3-voter voting schemes with n linearly ranked choices.at n=29A007009
• Triangle of coefficients in expansion of (4 + 5*x)^n.at n=22A013628
• Denominators of coefficients of expansion of Bessel function J_3(x).at n=2A014401
• Fibonacci sequence beginning 2, 18.at n=17A022371
• a(n) = n + (n+1)^2 + (n+2)^3.at n=29A027620
• a(n) is the n-th quartic factorial number divided by 4.at n=4A034177
• Triangle whose (i,j)-th entry is binomial(i,j)*5^(i-j)*4^j.at n=26A038246
• Triangle giving a(n,k) = number of k-colored labeled graphs with n nodes.at n=12A046860
• Denominators of coefficients in function a(x) such that a(a(x)) = log(1+x).at n=5A048608
• Triangle of coefficients of certain exponential convolution polynomials.at n=10A048786
• Number of n X n (-1,0,1)-matrices having maximum determinant (=A003433(n)).at n=4A051753
• E.g.f.: x/(1-4*x).at n=5A052570
• Saint-Exupéry numbers: ordered products of the three sides of Pythagorean triangles.at n=16A057096
• Number of matchings in the wheel graph with n spokes.at n=16A061705
• 13-almost primes (generalization of semiprimes).at n=6A069274
• (Sum of digits of n)^5 - (sum of digits^5 of n).at n=44A069965
• Numbers of the form 5*2^n or 5*3*2^n; a(n) = 5*A029744(n).at n=24A070004
• Numbers n such that the Diophantine equation x^4+y^5=n^4 has solutions.at n=38A070756
• Binary expansion is 1xx100...0 where xx = 00 or 11.at n=23A070876