-2460

Appears in sequences

• The q expansion of Lambda^5, a Hauptmodul for Gamma_1(5).at n=21A078905
• Expansions of the characteristic polynomials of certain matrices, see Mathematica code.at n=32A136449
• Coefficients in the expansion of ([r^2] + [2r^2]x + [3r^2]x^2 + ...)/([r] + [2r]x + [3r]x^2 + ...); [ ] = floor, r = golden ratio = (1 + sqrt(5))/2.at n=15A279586
• a(n) = Sum_{d|n} (-1)^(d-1)*d^2.at n=53A321543
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of B(x)^k, where B(x) is the g.f. of A385015.at n=61A385019