143498

Appears in sequences

• Positive numbers k such that k*(k+1) is a palindrome.at n=11A028336
• Number of strings of numbers x(i=1..n) in 0..3 with sum i^4*x(i) equal to n^4*3.at n=20A184342
• Number of n-node unlabeled rooted trees with thickening limbs and root outdegree (branching factor) 5.at n=46A245145
• Numbers n such that sigma(n) - n = Sum_{k|n, k < n} sigma*(k), where sigma(n) is the sum of the divisors of n and sigma*(k) is the sum of the anti-divisors of k.at n=15A259536