44040192

Appears in sequences

• Theta series of D*_21 lattice.at n=29A022074
• a(n) = n*2^n.at n=21A036289
• Triangle whose (i,j)-th entry is binomial(i,j)*8^(i-j)*8^j.at n=30A038286
• a(n) = n^n * (n^2 - 1)/24.at n=5A060348
• a(n) = n*omega(n)^n where omega(n) is the number of distinct prime divisors of n.at n=20A061340
• n*bigomega(n)^n, where bigomega(n) is the number of prime divisors of n, counted with multiplicity.at n=20A061452
• Order of automorphism group of the group C_n X C_n X C_n (where C_n is the cyclic group of order n).at n=7A064767
• Expansion of (1 - 4*x + 6*x^2)/(1 - 2*x)^2.at n=22A097064
• a(n) = n*(n-1)/2 * 2^(n*(n-1)/2).at n=6A103904
• a(n) = 2^(n-1)*A047240(n).at n=21A128205
• Row sums of triangle A134400.at n=21A134401
• Denominators of a series expansion for Pi/2.at n=31A156269
• Egyptian fraction expansion for Pi/4 = arctan(1/2) + arctan(1/3) (Hutton 1776).at n=20A157327
• a(n) = 21*2^n.at n=21A175805
• Numbers in A178168, sorted.at n=14A178169
• Denominators of expansion of (Sum_{k=1..n} 1/k) - log(n(1+1/(2n))) - gamma.at n=19A189049
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 94", based on the 5-celled von Neumann neighborhood.at n=29A285783
• a(n) = (2n + 1)*2^(2n + 1); numbers k such that v(k)*2^v(k) = k, where v(n) = A007814(n) is 2-adic valuation of n.at n=10A288443
• Triangle read by rows: T(n,k) = (-1)^(n-k)*binomial(n, k)*(k+3)^n, for n >= 0, and k = 0,1, ..., n. Coefficients of certain Sidi polynomials.at n=33A362353
• Triangular array read by rows: T(n, k) is the number of ways that a k-element transitive tournament can occur as a subtournament of a larger tournament on n labeled vertices.at n=30A365638