28114944

Appears in sequences

• 7-fold convolution of A000302 (powers of 4).at n=7A054337
• a(n) = (0^n + 4^n * binomial(2*n,n))/2.at n=7A098402
• T(n,k)=Number of pairs of orthogonal (-x,y) vectors of length k*(x+y), where x/y is the n-th rational <= 1, ordered first by y and then x, e.g. 1/1, 1/2, 1/3, 2/3, 1/4, 3/4 ...at n=21A225987
• 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 222", based on the 5-celled von Neumann neighborhood.at n=25A286777
• p-INVERT of (1,1,1,1,1,...), where p(S) = (1 - S^2)^3.at n=21A291013
• a(n) = max{A380114(n, k) : k = 0..n}.at n=14A380115