123607

Appears in sequences

• Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 1,0 1,1 0,-1 or -1,1.at n=9A264571
• a(n) = 6*binomial(n,4) + 2*binomial(n,2) + 1.at n=28A341703