1753920

Appears in sequences

• Number of labeled trivalent (or cubic) cyclically 4-connected graphs with 2n nodes.at n=3A007101
• Triangle read by rows: T(n,k) is the number of n-bead necklaces using exactly k colors with no adjacent beads having the same color.at n=52A330618
• El Gradechi's hybrid coefficients alpha^{4,4}_{2n}.at n=13A331768