-976

Appears in sequences

• Expansion of e.g.f.: log(1+sinh(x)/cos(x)).at n=6A009361
• Expansion of e.g.f. sinh(log(1+tan(x))).at n=6A009569
• Sequence of Mahler coefficients of the Gray code function.at n=11A109629
• Expansion of (8 / 7) * (1 - eta(q)^7 / eta(q^7)) - 7 * (eta(q) * eta(q^7))^3 in powers of q.at n=32A138810
• First differences of A072272.at n=55A170878
• a(0)=a(1)=a(2)=0, a(3)=1; thereafter a(n) = 4a(n-3)-5a(n-4).at n=18A178219
• Expansion of Product_{n>=0} (1 + q*(-q^2)^n) / (1 - q*(-q^2)^n).at n=61A193863
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 219", based on the 5-celled von Neumann neighborhood.at n=17A270933
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 534", based on the 5-celled von Neumann neighborhood.at n=33A272789
• Expansion of Product_{k>=1} ((1 - x^k)/(1 + x^k))^(sigma_2(k)).at n=8A320972
• a(1) = 1; a(n) = -Sum_{d|n, d < n} A341512(n/d) * a(d), where A341512(n) = sigma(n)*A003961(n) - n*sigma(A003961(n)).at n=56A347096
• a(n) = n - A243071(n).at n=45A364288
• a(n) = 4^n cos(nC), where C is the angle opposite side AB in a triangle ABC having sidelengths |BC|=2, |CA| = 3, |AB| = 4; ABC is the smallest integer-sided scalene triangle.at n=5A375882