-2269

Appears in sequences

• Let f(n)=Floor[Mod[10^k*(7/(4*k + 1) - 6/(4*k + 3) - 1/(4*k + 5)), 3]]; M0 = {{0, 1}, {1, 1/2}}; M = {{0, 2}, {2, 1}}; as Mh=M0.M.(M0+I*f[n]); v[(n)=Mh.v(n-1), then a(n) is the first element of v.at n=9A152270
• Let f(n)=Floor[Mod[10^k*(7/(4*k + 1) - 6/(4*k + 3) - 1/(4*k + 5)), 3]]; M0 = {{0, 1}, {1, 1/2}}; M = {{0, 2}, {2, 1}}; as Mh=M0.M.(M0+I*f[n]); v[(n)=Mh.v(n-1), then a(n) is the first element of v.at n=10A152270
• Triangle of coefficients of Faber polynomials for (3*x - sqrt(x^2 - 4*x))/2.at n=36A226952
• Square array A(n,k), n >= 0, k >= 1, read by antidiagonals downwards, where column k is the expansion of e.g.f. exp(-Sum_{j=1..k} x^j).at n=52A334561
• E.g.f.: exp(-(x + x^2 + x^3)).at n=7A334562
• Numerators of the partial alternating sums of the reciprocals of the alternating sum of divisors function (A206369).at n=32A379621