69947

Appears in sequences

• Numbers k such that 99*2^k+1 is prime.at n=47A032399
• Numbers whose base-4 representation has exactly 9 runs.at n=26A043600
• Numbers n such that number of runs in the base 4 representation of n is congruent to 0 mod 9.at n=26A043858
• Numbers k such that number of runs in the base 4 representation of k is congruent to 9 mod 10.at n=26A043876