Number of city-block distance 1, pressure limit 2 movements in an n X 2 array with each element moving exactly one horizontally or vertically and no element acquiring more than two neighbors.
A217022
Number of city-block distance 1, pressure limit 2 movements in an n X 2 array with each element moving exactly one horizontally or vertically and no element acquiring more than two neighbors.
Terms
- a(0) =1a(1) =16a(2) =121a(3) =1024a(4) =8464a(5) =70225a(6) =582169a(7) =4826809a(8) =40018276a(9) =331786225a(10) =2750792704a(11) =22806436324a(12) =189084955921
External references
- oeis: A217022