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.
A264571
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.
Terms
- a(0) =1a(1) =4a(2) =10a(3) =44a(4) =143a(5) =633a(6) =2172a(7) =8409a(8) =32046a(9) =123607a(10) =467535a(11) =1782748a(12) =6811612a(13) =25977296a(14) =98955733a(15) =377295524a(16) =1439130735a(17) =5486977972a(18) =20918581591a(19) =79761954903a(20) =304138808396
External references
- oeis: A264571