Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,4,0,2,1 for x=0,1,2,3,4.
A197302
Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,4,0,2,1 for x=0,1,2,3,4.
Terms
- a(0) =2a(1) =10a(2) =31a(3) =98a(4) =344a(5) =1139a(6) =3750a(7) =12470a(8) =41479a(9) =137872a(10) =458412a(11) =1524061a(12) =5066480a(13) =16842888a(14) =55992885a(15) =186143874a(16) =618820898a(17) =2057222809a(18) =6839076870a(19) =22735974296a(20) =75583965757a(21) =251272978516a(22) =835337355004
External references
- oeis: A197302