75057

Appears in sequences

• Palindromes whose smallest palindromic proper multiple is the number concatenated with itself.at n=21A119368
• L.g.f.: A(x) satisfies: A(x+x^2) = 2*A(x) - log(1+x) with A(0)=0; thus A(x) = log(B(x)), where B(x) is g.f. of A122938.at n=7A122940
• Number of inequivalent 2*n X 6 binary arrays with row sums 3 and column sums n up to row and column permutations.at n=13A377003