Number of nX4 array permutations with each element not moving, or moving one space N, SW or SE.
A189430
Number of nX4 array permutations with each element not moving, or moving one space N, SW or SE.
Terms
- a(0) =1a(1) =5a(2) =29a(3) =140a(4) =841a(5) =4653a(6) =26589a(7) =151081a(8) =859264a(9) =4891841a(10) =27832869a(11) =158410277a(12) =901506585a(13) =5130598532a(14) =29198860965a(15) =166174106629a(16) =945717892865
External references
- oeis: A189430