-1532

Appears in sequences

• Expansion of e.g.f. cos(log(1+tanh(x))).at n=8A009022
• a(n) = a(n-2) - (a(n-1) - a(n-2)) if (n mod 2) = 0, otherwise a(n) = a(n-1) - (a(n-3) - a(n-4)), with a(0) = 0, a(1) = 1, a(2) = -1, a(3) = 2.at n=37A135690
• a(n) = 4 - 3*2^n.at n=9A165751
• a(n) = coefficient of x^n*y^n in Product_{n>=1} (1 - (x^n + y^n))^3.at n=15A322214