2903040

Appears in sequences

• Sorted list of orders of Weyl groups of types A_n, B_n, D_n, E_n, F_4, G_2.at n=23A001217
• Orders of Weyl groups of type E_n.at n=1A003134
• (2*n)!-Sum ((-1)^(i+1)*binomial(n,i)*2^i*(2*n-1)!,i=1..n).at n=4A006548
• Theta series of (probably nonexistent) exceptionally good 16-dimensional sphere packing.at n=7A008774
• a(n) = 4^n*(2*n+1)!*(n!)^2/(n+1).at n=3A010053
• The number of permutations of n cards in which 2 is the first card hit and 3 the next hit after 2.at n=9A018931
• Theta series of 10-dimensional lattice (C6 X SU(4,2)):C2 with minimal norm 4.at n=22A029770
• Compositorial numbers: product of first n composite numbers.at n=7A036691
• Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*6^j.at n=32A038236
• Triangle whose (i,j)-th entry is binomial(i,j)*6^(i-j)*4^j.at n=31A038258
• n! divided by its squarefree kernel.at n=14A049614
• Triangle read by rows: T(n,k) = n!*k.at n=43A051683
• E.g.f. x^2*(1-x)/(1-x-x^2).at n=9A052602
• E.g.f. (1-x)/(1-x-x^3-x^4+x^5).at n=9A052651
• a(n) = Product_{p prime} p^{ Sum_{k>=0} floor[(n-1)/((p-1)p^k)]}.at n=6A053657
• Triangle of coefficients of x^2 in the Neumann polynomials.at n=26A057869
• Least number whose number of divisors is n-th term from A014613 (numbers of form p*q*r*s, products of exactly 4 primes, counted with multiplicity).at n=27A061218
• a(n) = n! * (n-1).at n=8A062119
• Sum of divisors of central binomial coefficient binomial(n, floor(n/2)).at n=22A064139
• Sum of unitary divisors of central binomial coefficient C(n, floor(n/2)).at n=22A064140