465920

Appears in sequences

• a(n) = Product_{i=1..n} (9^i - 1).at n=3A027877
• Number of primitive (aperiodic, or Lyndon) 3-asymmetric rhythm cycles: ones having no nontrivial shift automorphism. 3-asymmetric rhythm cycles (A115115): binary necklaces of length 3n subject to the restriction that for any k if the k-th bead is of color 1 then the (k+n)-th and (k+2n)-th beads (modulo 3n) are of color 0.at n=11A115117
• a(n) = binomial(n+3,4)*4^4.at n=12A120054
• Number of alternating polynomials of degree 3n in GF(2)[X], n>0.at n=23A165912
• Number of singly defective permutations of 1..n with exactly 1 maximum.at n=12A183264
• Column k = 3 of triangular array in A165241.at n=10A202481
• Total number of factorial parts in all compositions of n.at n=17A309538
• Number of nonequivalent 2-column nonnegative integer matrices with column sums n and any number of nonzero rows up to permutation of rows and columns.at n=13A331722
• a(n) = n^2 * 2^n * binomial(4*n, n).at n=4A378805