820328

Appears in sequences

• Irregular triangle read by rows: row n gives scaled coefficients of the chromatic polynomial corresponding to colorings of the n-hypercube graph up to automorphism, highest powers first, 0 <= k <= 2^n.at n=25A334358
• a(n) = Sum_{k=0..floor(n/4)} binomial(n+2*k,n-4*k).at n=18A373906
• Expansion of (1 - x^2 - x^3)/((1 - x^2 - x^3)^2 - 4*x^5).at n=27A376729