Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,3,1,1,1 for x=0,1,2,3,4.
A197397
Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,3,1,1,1 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =17a(2) =81a(3) =547a(4) =2571a(5) =13397a(6) =78101a(7) =423957a(8) =2255611a(9) =12173719a(10) =66864485a(11) =361733507a(12) =1953439221a(13) =10607016995a(14) =57610139877a(15) =312099473393
External references
- oeis: A197397