60369

Appears in sequences

• Number of quasi-tetrominoes in an n X n bounding box.at n=10A094171
• Numbers k such that sum of digits of k = sum of digits of anti-divisors of k.at n=25A213239
• a(n) = Sum_{k=0..floor(n/5)} (n-4*k)!/(n-5*k)!.at n=30A357570