Number of (n+1) X (2+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,1 0,-1 0,2 1,0 or -1,0.
A264251
Number of (n+1) X (2+1) arrays of permutations of 0..n*3+2 with each element having directed index change 0,1 0,-1 0,2 1,0 or -1,0.
Terms
- a(0) =10a(1) =33a(2) =180a(3) =760a(4) =3653a(5) =16401a(6) =76330a(7) =348480a(8) =1607429a(9) =7373520a(10) =33925033a(11) =155833327a(12) =716445000a(13) =3292287537a(14) =15133013897a(15) =69549148120a(16) =319662372941
External references
- oeis: A264251