Number of permutations of an n X 7 array with each element moving exactly one horizontally or vertically and without 2-loops.
A216799
Number of permutations of an n X 7 array with each element moving exactly one horizontally or vertically and without 2-loops.
Terms
- a(0) =0a(1) =42a(2) =0a(3) =7676a(4) =0a(5) =1879040a(6) =0a(7) =489300384a(8) =0a(9) =129127695440a(10) =0a(12) =0a(14) =0a(16) =0a(18) =0a(20) =0a(22) =0
External references
- oeis: A216799