-1139

Appears in sequences

• a(n) = -(1/2)*(n+2)*(n^2 - 6*n - 1).at n=15A028494
• Start with 1, add the next number if one gets a prime then add the next number else subtract the next...at n=49A074170
• a(n) = Sum_{k=0..n} A105595(k)*(-1)^k*A105595(n-k) (interpolated zeros suppressed).at n=36A105596
• G.f.: q-Cosh(x,q)^2 - q-Sinh(x,q)^2 at q=-x.at n=54A198199
• Triangle read by rows: T(n,k) is the coefficient A_k in the transformation Sum_{k=0..n} (k+1)*x^k = Sum_{k=0..n} A_k*(x+3)^k.at n=15A246798
• Triangle read by rows: T(n,k) is the coefficient A_k in the transformation of 1 + x + x^2 + ... + x^n to the polynomial A_k*(x+3)^k for 0 <= k <= n.at n=22A248811
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 305", based on the 5-celled von Neumann neighborhood.at n=19A271163
• Expansion of Product_{k>=1} (1 - x^k)^(k+1).at n=38A299019
• First term of n-th difference sequence of (floor(k*r)), r = -sqrt(7), k >= 0.at n=19A325673