Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,0,1,2 for x=0,1,2,3,4.
A197230
Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,0,1,2 for x=0,1,2,3,4.
Terms
- a(0) =2a(1) =12a(2) =55a(3) =242a(4) =1178a(5) =5355a(6) =24723a(7) =116440a(8) =545287a(9) =2548432a(10) =11939565a(11) =55931989a(12) =261856867a(13) =1226207807a(14) =5742642388a(15) =26891481148a(16) =125926466092a(17) =589702469437
External references
- oeis: A197230