273371

Appears in sequences

• Composite numbers whose prime factors have no digits other than 7's and 9's.at n=31A036324
• The number of n-permutations whose connected components have the same size.at n=8A182449
• a(n) = 7*a(n-1) - 14*a(n-2) + 7*a(n-3), a(0)=0, a(1)=1, a(2)=5.at n=10A215008