81188

Appears in sequences

• Given the infinite continued fraction i+(i/(i+(i/(i+...)))), where i is the square root of (-1), this is the numerator of the imaginary part of the convergents.at n=16A091808
• Expansion of x/(x^4-x^3-2x^2-x+1).at n=17A092886
• a(n+1) is the Hankel transform of C(n)+C(n+2), where C(n) = A000108(n).at n=8A138269
• Number of (n+4) X 7 0..1 matrices with each 5 X 5 subblock idempotent.at n=19A224685
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-2)*b(n-1)*b(n), where a(0) = 3, a(1) = 4, b(0) = 1, b(1) = 2, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences.at n=13A296283
• Number of graph minors in the cycle graph C_n.at n=32A353206