-2842

Appears in sequences

• Expansion of Product_{k>=1} (1-x^k)^29.at n=3A010834
• A symmetrical triangle of polynomial coefficients that are von Koch like: b=1/4; p(x, n) = If[Mod[n, 4] == 2, (b*x - n/2)*p(x, n - 1), If[ Mod[n, 4] == 3, (x/2 - b*n + 1/2)*p(x, n - 1), If[ Mod[n, 4] == 0, (-b*x - n/2 + b)*p(x, n - 1), (x/2 + b*n)*p(x, n - 1)]]]; q(x,n)=(p(x,n)+x^n*(p(1/x,n))/b^n.at n=24A155688
• a(n) = -(n - 4)*(n - 5)*(n - 12)/6.at n=27A167541