104401

Appears in sequences

• Triangle read by rows in which row n gives n smallest palindromic numbers of n digits each.at n=19A081930
• a(n) = Sum_{k=0..n} binomial(floor((n+1)/2), floor((k+1)/2)) * 4^k.at n=8A097175
• a(n) = 5*F(n)^2 + 5*F(n) + 1, where F(n) = Fibonacci(n).at n=12A124297
• Odd palindromes which are semiprimes with an even number of digits.at n=19A132288
• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 110-111-101 pattern in any orientation.at n=11A146257
• 5 F(2n) (F(2n) + 1) + 1 where F(n) denotes the n-th Fibonacci number.at n=6A156095