-1439

Appears in sequences

• a(n) = -n^2 + 9*n + 23.at n=43A126719
• The c coefficients of the transform a*x^2 + (4*a/k - b)*x + 4*a/k^2 + 2*b/k + c = 0 for a,b,c = 1,-1,-1, k = 1,2,3...at n=38A229526
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 387", based on the 5-celled von Neumann neighborhood.at n=25A271546
• E.g.f. satisfies A(x) = exp(x - x^4 * A(x)).at n=6A362431