27648

Appears in sequences

• Hyperfactorials: Product_{k = 1..n} k^k.at n=4A002109
• Cluster series for bond percolation problem on diamond.at n=9A003208
• Theta series of laminated lattice LAMBDA_10.at n=7A006909
• a(n) = Product_{i=0..7} floor((n+i)/8).at n=29A009694
• Multiply successively by 1 (once), 2 (twice), 3 (thrice), etc.at n=10A010552
• Theta series of lattice Kappa_7.at n=33A015236
• Numbers of form 3^i*4^j, with i, j >= 0.at n=43A025613
• Number of primitive polynomials of degree n over GF(9).at n=6A027745
• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 83.at n=36A031581
• a(n) = n^3 * Product_{p|n, p prime} (1 + 1/p).at n=23A033196
• a(n) = 2*n^3.at n=24A033431
• Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*12^j.at n=13A038242
• Triangle whose (i,j)-th entry is binomial(i,j)*12^(i-j)*4^j.at n=11A038330
• a(n) = (3^3)*4^(n-3) with a(0)=1, a(1)=1 and a(2)=7.at n=8A056120
• A hierarchical sequence (S(W'2{3}*c) - see A059126).at n=8A059162
• Numbers that are the products of distinct substrings (>1) of themselves and do not end in 0.at n=31A059470
• Factorial splitting: write n! = x*y*z with x<y<z and x maximal and z is minimal; sequence gives value of y.at n=13A061031
• Nonpalindromic numbers k such that k is not divisible by 10 and k*R(k) is a square, where R(k) is the reversal of k (A004086).at n=28A062917
• Smallest numbers such that the number of terms in inverse set usigma equals n; where usigma = A034448.at n=43A063975
• Numbers n such that n=phi(n)*core(n) where phi(x) is the Euler totient function and core(x) the squarefree part of x (the smallest integer such that x*core(x) is a square).at n=22A069185