-844

Appears in sequences

• a(n) = -2*a(n - 1) -a(n - 2) -a(n - 3), a(0) = a(1) = a(2) = 1.at n=13A056016
• Irregular triangle, read by rows: T(n, k) = [x^k]( y(n, x) ), where y(n, x) = - 2*y(3, x) - x*y(n-1, x) + 2*x^2*y(n-1, x) + x^2*y(n-2, x), and y(1, x) = -8 - 3*x + 8*x^2, y(2, x) = 4 - 4*x - 10*x^2 + 4*x^3 + 4*x^4, y(3, x) = -8 + 4*x + 24*x^2 - 9*x^3 - 24*x^4 + 4*x^5 + 8*x^6.at n=57A131641
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 179", based on the 5-celled von Neumann neighborhood.at n=17A270625
• Expansion of Product_{k>0} 1/(1 + x^k)^(k*4).at n=13A279411
• Expansion of Product_{k>=1} 1/(1 + k^2*x^k).at n=11A292165
• Numbers k such that 4*k + 1 is a perfect cube, sorted by absolute values.at n=7A305290