-2197

Appears in sequences

• a(n) = 2*a(n-1) - a(n-2) - a(n-4).at n=20A131041
• Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of max{2i+j-2,2j+i-2} (A204004).at n=37A204005
• Coefficients in the expansion of ([s] + [2s]x + [3s]x^2 + ...)/([r] + [2r]x + [3r]x^2 + ...); [ ] = floor, r = sqrt(3), s = r/(1-r).at n=34A279630
• Coefficients in asymptotic expansion of sequence A293236.at n=9A293267
• Dirichlet g.f.: 1 / zeta(s-3).at n=12A334659
• a(1) = 1, a(2) = -9; a(n) = -n^3 * Sum_{d|n, d < n} a(d) / d^3.at n=12A359531