-2591

Appears in sequences

• Values of n such that L(7) and N(7) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.at n=31A226927
• E.g.f.: r / sqrt(1 + cos(r*x)^2) where r = sqrt(2), even powers only.at n=4A263248
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 371", based on the 5-celled von Neumann neighborhood.at n=29A271457
• G.f. satisfies A(x) = 1 + x/(1 + x^3) * A(x/(1 + x^3)).at n=15A360898
• Elliptic net associated to y^2 + y = x^3 + x^2 - 2*x, based on the non-torsion generator points P = [0, 0] and Q = [1, 0].at n=41A374833