Number of n X 3 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2.
A221196
Number of n X 3 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2.
Terms
- a(0) =2a(1) =10a(2) =46a(3) =212a(4) =976a(5) =4492a(6) =20672a(7) =95128a(8) =437752a(9) =2014400a(10) =9269632a(11) =42655888a(12) =196288736a(13) =903257824a(14) =4156502752a(15) =19126892096a(16) =88015820416a(17) =405020564416
External references
- oeis: A221196