49626

Appears in sequences

• Numbers k > 1 such that, in base 5, k and k^2 contain the same digits in the same proportion.at n=21A061659
• a(n) = Sum{k=0..n} binomial(n,k)^2*C(k), where C() = A000108() are the Catalan numbers.at n=7A086618
• Half the number of 0..n arrays of length 4 with second differences nonzero.at n=16A212783
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 65", based on the 5-celled von Neumann neighborhood.at n=42A270085
• Convolution of A000009 and A000290.at n=26A360487