27587

Appears in sequences

• Numbers k such that A109631(k) - A109631(k+1) = A109631(k+2).at n=17A109715
• Number of binary strings of length n with no substrings equal to 0001 0111 or 1100.at n=18A164484
• a(n) = 7*(a(n-1) - a(n-2) - a(n-3)), with a(0)=3, a(1)=7, a(2)=35.at n=6A215575
• G.f. A(x) satisfies 0 = A(0) and 0 = f(x, A(x)) where f(u, v) = (u - v) * (1 + u*v) - u*v * (1 - u*v).at n=17A245735
• a(n) = (7*(cot(1*Pi/7))^2)^n + (7*(cot(2*Pi/7))^2)^n + (7*(cot(4*Pi/7))^2)^n.at n=3A287405