868352

Appears in sequences

• a(n) = 0^n/2 + 2^n*(n^2+n+2)/4.at n=14A087431
• G.f. S(x) satisfies: C(C(x)) + S(S(x)) = x where S(C(x)) = 2*x*C(x).at n=13A192058
• a(n) = 2^(n-2) * prime(n).at n=15A239885
• Smallest number k that cannot be expressed as x^2 + y^2 + z^2 + w^2 where x >= y >= z >= w >= 0 and x > floor(sqrt(k)) - n, but can be so expressed if x = floor(sqrt(k)) - n.at n=34A285552
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 870", based on the 5-celled von Neumann neighborhood.at n=19A290625
• a(0) = 1, a(1) = 4, a(2) = 11, and a(n) = 4*a(n-1) - 4*a(n-2) for n >= 3.at n=16A339252