69912

Appears in sequences

• Numbers whose base-4 representation has exactly 9 runs.at n=3A043600
• Numbers n such that number of runs in the base 4 representation of n is congruent to 1 mod 8.at n=27A043851
• Numbers n such that number of runs in the base 4 representation of n is congruent to 0 mod 9.at n=3A043858
• Numbers k such that number of runs in the base 4 representation of k is congruent to 9 mod 10.at n=3A043876
• a(n) = (Sum{k=0..n-1} a(k)) - a(n-3), with a(0)=0, a(1)=0, a(2)=1.at n=21A049856
• a(n) = a(n-1) - 81*a(n-2), a(0)=1, a(1)=9.at n=5A133672