-12208

Appears in sequences

• E.g.f. log(1+x)/cos(x).at n=8A009429
• Expansion of tan(sin(x))*sinh(x)/2.at n=5A024246
• a(n) = -2*a(n-1) + a(n-2) + a(n-3) with a(0)=a(1)=-1, a(2)=1.at n=13A215112