606606

Appears in sequences

• Expansion of 1/((1-5x)(1-6x)(1-11x)).at n=5A019854
• Palindromes which are the product of 6 distinct primes.at n=4A046396
• a(1) = 6, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).at n=3A082781
• Triangle of numerators of coefficients of the polynomial Q_m(n) defined by the recursion Q_0(n)=1; for m >= 1, Q_m(n) = Sum_{i=1..n} i*Q_(m-1)(i). For m >= 1, the denominator for all 2*m+1 terms of the m-th row is A053657(m+1).at n=43A202339
• Number of 4-cycles in the n-triangular honeycomb queen graph.at n=22A289705
• Palindromes with exactly 6 distinct prime divisors.at n=6A373466
• a(n) is the least palindrome that has exactly n palindromic divisors other than itself and 1.at n=27A378140