70023

Appears in sequences

• Numbers whose base-4 representation has exactly 9 runs.at n=29A043600
• Numbers n such that number of runs in the base 4 representation of n is congruent to 0 mod 9.at n=29A043858
• Numbers k such that number of runs in the base 4 representation of k is congruent to 9 mod 10.at n=29A043876
• a(0) = 1, a(n) = Sum_{k=1..n} stirling2(n,k) * k^(2*k).at n=4A308490