149229

Appears in sequences

• Numbers k such that k and k^2 use only the digits 1, 2, 4, 6 and 9.at n=55A136995
• Vauban's sequence: a(n)=0 if n<=0, a(1)=1; thereafter a(n) = 3*a(n-1) + 6*a(n-2) + 6*a(n-3) + 6*a(n-4) + 6*a(n-5).at n=9A224749