Number of (4+1) X (n+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.
A264478
Number of (4+1) X (n+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) =1a(1) =8a(2) =16a(3) =120a(4) =456a(5) =2272a(6) =11044a(7) =49200a(8) =236196a(9) =1113296a(10) =5157772a(11) =24352896a(12) =114256032a(13) =534574312a(14) =2511482164a(15) =11778946872a(16) =55224573264a(17) =259130295272
External references
- oeis: A264478