207681

Appears in sequences

• Composites whose prime factorization in base 7 is an anagram of the number in base 7.at n=16A260051
• a(0) = 1, a(1) = 2; for k>0, a(2*k) = k*a(2*k-1) + a(2*k-2), a(2*k+1) = a(2*k) + a(2*k-1).at n=14A273939