28221

Appears in sequences

• Strong pseudoprimes to base 68.at n=28A020294
• a(n) = (2*n+1)*(12*n+1).at n=34A033576
• Triangle R, read by rows, such that R^3 transforms column k of R^3 into column k+1 of R^3, so that column k of R^3 equals column 0 of R^(3*k+3), where R^3 denotes the matrix cube of R.at n=41A113389
• Triangle T(n,k) = 4*binomial(n,k)^2 - 3, read by rows, 0<=k<=n.at n=48A141596
• Triangle T(n,k) = 4*binomial(n,k)^2 - 3, read by rows, 0<=k<=n.at n=51A141596
• Number of length n+1 0..2 arrays with the sum of the minimum of each adjacent pair multiplied by some arrangement of +-1 equal to zero.at n=8A250413
• G.f.: Product_{k>=1} (1+x^k)^(2*k-1).at n=16A255835
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 483", based on the 5-celled von Neumann neighborhood.at n=33A267829