27837

Appears in sequences

• Number of nX1 0..4 arrays with every element value z a city block distance of exactly z from another element value z.at n=11A209717
• a(n) = T(n, 4) with T(n, k) = Sum_{d|k} phi(d)*binomial(n - 1 + k/d, k/d).at n=27A327032
• a(n) is the number of 4 element sets of distinct integer sided strict rectangles that fill an n X n square.at n=38A384724