43008

Appears in sequences

• Symmetries in unrooted (1,3) trees on 2n vertices.at n=13A003610
• Number of directed Hamiltonian cycles (or Gray codes) on n-cube with a marked starting node.at n=3A006069
• Number of 3 X 3 matrices whose determinant is 1 mod n.at n=3A011785
• Number of n X n matrices over Z_4 whose determinant is 1.at n=2A011787
• Triangle of coefficients in expansion of (4+7x)^n.at n=22A013625
• Place n distinguishable balls in n boxes (in n^n ways); let f(n,k) = number of ways that max in any box is k, for 1<=k<=n; sequence gives triangle of numbers f(n,k)/n.at n=41A019576
• Expansion of (theta_3(z^4)^3 + theta_2(z^4)^3)^4.at n=17A028697
• Triangle whose (i,j)-th entry is binomial(i,j)*2^i.at n=48A038208
• Triangle whose (i,j)-th entry is binomial(i,j)*2^i.at n=51A038208
• Triangle whose (i,j)-th entry is binomial(i,j)*2^(i-j)*8^j.at n=30A038214
• Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*4^j.at n=26A038270
• Triangle whose (i,j)-th entry is binomial(i,j)*8^(i-j)*2^j.at n=33A038280
• Apart from the leading term, a(n) = Catalan(n-1)*4^(n-1).at n=6A052704
• Expansion of e.g.f. x^2*exp(4*x).at n=7A052780
• McKay-Thompson series of class 12e for Monster.at n=43A058493
• 13-almost primes (generalization of semiprimes).at n=8A069274
• Denominators in the Maclaurin series for arctan(1+x).at n=20A075554
• Triangle with T(n,k)=n!*(k-1)^k/k! where 1<=k<=n.at n=25A076482
• a(n) is the number of occurrences of 7's in the palindromic compositions of 2*n-1, or also, the number of occurrences of 8's in the palindromic compositions of 2*n.at n=11A079861
• Number of subsets of {1,.., n} containing exactly two primes.at n=17A089822