59395

Appears in sequences

• Nontrivial palindromes k such that phi(k) is also a palindrome.at n=7A067723
• Numbers n such that phi(reversal(n)) = reversal(phi(n)). Ignore leading 0's.at n=25A069282
• Numbers n such that n and phi(n) are both palindromes.at n=16A069747
• Matrix cube of triangle A113340.at n=23A113360
• Column 2 of triangle A113360, also equals column 1 of A113340^5.at n=4A113362
• Expansion of x/((1 - x - x^4)*(1 - x)^3).at n=25A145132
• Triangular array P*(2*I - P^2)^-1, where P is Pascal's triangle A007318 and I is the identity matrix.at n=31A162313
• Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,3,1,1,1 for x=0,1,2,3,4.at n=6A197620
• Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,3,1,1,1 for x=0,1,2,3,4.at n=4A197622
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 0,3,1,1,1 for x=0,1,2,3,4.at n=59A197623
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 0,3,1,1,1 for x=0,1,2,3,4.at n=61A197623
• a(n) = Sum_{k=1..n-1} k^2*phi(k) + n^2*phi(n)/2, where phi = A000010.at n=23A333293