46800

Appears in sequences

• Expansion of e.g.f. cos(log(1+x)).at n=9A003703
• Theta series of E_6 lattice.at n=28A004007
• Spiral sieve using Fibonacci numbers.at n=22A005621
• Number of points on surface of 4-dimensional cube.at n=18A008511
• a(n) = floor(n*(n-1)*(n-2)*(n-3)/9).at n=27A011919
• Maximization of sums of cubes of integer differences (b_[ i ]-i)^3 over permutations {b_[ i ], for i-1,2,...,n} on first n integers.at n=33A049031
• a(n) = (1 + 2^n) * n!.at n=6A052561
• E.g.f. (2-2x-x^2)/((1-2x)(1-x^2)).at n=6A052647
• The binary encoding (as a rooted planar tree) of each rooted planar binary tree. See A057123 for illustration.at n=9A057122
• Iteration of unitary-sigma function: a(1) = 2, a(n) = usigma(a(n-1)).at n=24A059460
• Numbers n such that sum of digits of n equals the sum of digits of n^3.at n=33A070276
• Numbers containing squares of Pythagorean triples in their divisor set.at n=12A096472
• Location of records in A099564.at n=14A099565
• Number of ways to change three non-identical letters in the word aabbccdd..., where there are n types of letters.at n=25A102860
• Numbers k such that the sums of the digits of k, k^2 and k^3 coincide.at n=13A111434
• Triangular sequence of coefficients of the expansion of a degenerate partition of Chebyshev U(x,n);A053117 and Hermite H(x,n);A060821 functions: 1) f(x,t)=1/(1-2*x*t+t^2); 2) g(x,t)=Exp[2*x*t-t^2]; to give: p(x,t)=Exp[2*x*t-t^2]/(1-2*x*t+t^2).at n=23A137862
• a(n) = n*(n^2+4).at n=36A155965
• Triangle T(n, k) = (2*n+1)!! * 2^(1 + floor(n/2) + floor(k/2) + floor((k-1)/2)) * Beta(floor(n/2) + floor((k-1)/2) + 2, floor((n-1)/2) + floor(k/2) + 2), read by rows.at n=24A158867
• Triangle T(n, k) = (2*n+1)!! * 2^(1 + floor(n/2) + floor(k/2) + floor((k-1)/2)) * Beta(floor(n/2) + floor((k-1)/2) + 2, floor((n-1)/2) + floor(k/2) + 2), read by rows.at n=23A158867
• Where A174102 sets a new record.at n=38A173570