Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,0,1,1,1 for x=0,1,2,3,4.
A197245
Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,0,1,1,1 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =8a(2) =3a(3) =53a(4) =110a(5) =227a(6) =1035a(7) =2004a(8) =7529a(9) =20633a(10) =53902a(11) =172997a(12) =474139a(13) =1395792a(14) =4009631a(15) =11336881a(16) =33563326a(17) =95906965a(18) =275694011a(19) =796470870a(20) =2294495057a(21) =6647188965a(22) =19110664400a(23) =55033208033a(24) =159018294491a(25) =458707454692
External references
- oeis: A197245