Number of (n+1) X (4+1) arrays of permutations of 0..n*5+4 with each element having directed index change 0,1 1,0 2,1 or -1,-1.
A264472
Number of (n+1) X (4+1) arrays of permutations of 0..n*5+4 with each element having directed index change 0,1 1,0 2,1 or -1,-1.
Terms
- a(0) =0a(1) =8a(2) =16a(3) =120a(4) =456a(5) =2232a(6) =10116a(7) =45792a(8) =212112a(9) =960336a(10) =4418388a(11) =20134008a(12) =92208780a(13) =421315344a(14) =1926779076a(15) =8809428456a(16) =40277366640a(17) =184164908040a(18) =842016117672
External references
- oeis: A264472