Number of nX3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 3 neighboring 1s.
A297539
Number of nX3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 3 neighboring 1s.
Terms
- a(0) =1a(1) =11a(2) =35a(3) =88a(4) =461a(5) =2050a(6) =8057a(7) =35640a(8) =158090a(9) =679629a(10) =2963173a(11) =12981912a(12) =56560118a(13) =246687460a(14) =1077347659a(15) =4701310128a(16) =20514731834a(17) =89541862920a(18) =390793087220
External references
- oeis: A297539