64846

Appears in sequences

• Palindromes with exactly 2 distinct palindromic prime factors.at n=42A046408
• Palindromes n such that n and n^2 have same digit sum.at n=18A058852
• a(n) = 1 + Sum_{k=1..n} Sum_{d|k} mu(k/d)*p(d), where p(d) = number of partitions of d (A000041).at n=34A306912
• Number of oriented polyomino rings of length 4n with fourfold rotational symmetry.at n=17A324406