275764

Appears in sequences

• Number of (4+1) X (n+1) arrays of permutations of 0..n*5+4 with each element having directed index change -2,-2 -1,0 0,1 or 1,0.at n=8A264537
• a(n) = (6/n^3) * Sum_{d|n} moebius(n/d)*binomial(2*d,d).at n=14A268592