683280
domain: N
Appears in sequences
- Number of irreducible polynomials of degree n over GF(9); dimensions of free Lie algebras.at n=7A027381
- G.f. of the z^2 coefficients of the FP1 in the third column of the A156921 matrix.at n=8A156929
- Number of 7-bead necklaces of n colors not allowing reversal, with no adjacent beads having the same color.at n=9A208537