-3416

Appears in sequences

• a(n) = -a(n-2) - a(n-3).at n=39A112455
• Triangle A124029 with the (0,0) entry replaced by 4.at n=41A123966
• Triangle T(n,k) with the coefficient [x^k] of the characteristic polynomial of the following n X n triangular matrix: 4 on the main diagonal, -1 of the two adjacent subdiagonals, 0 otherwise.at n=41A124029
• Riordan array (1/(1+4x+x^2), x/(1+4x+x^2)).at n=41A159764
• Expansion of o.g.f.(1-x^4)/(1-x+x^8).at n=56A193669
• a(n) = A000730(7*n).at n=34A282941
• Triangle read by rows, expansion of exp(x*z)*z*(tanh(z) + sech(z)), T(n, k) for n >= 1 and 0 <= k <= n-1.at n=29A294033
• Expansion of g.f. A(x) satisfying Sum_{n=-oo..+oo} (-1)^n * (x^n - 4*A(x))^n = theta_3(x).at n=5A369672