Number of nX2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,4,1,2 for x=0,1,2,3,4.
A196140
Number of nX2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,4,1,2 for x=0,1,2,3,4.
Terms
- a(0) =3a(1) =5a(2) =8a(3) =17a(4) =34a(5) =62a(6) =123a(7) =243a(8) =471a(9) =924a(10) =1817a(11) =3558a(12) =6978a(13) =13697a(14) =26865a(15) =52699a(16) =103398a(17) =202847a(18) =397944a(19) =780720a(20) =1531657a(21) =3004865a(22) =5895113a(23) =11565346a(24) =22689467a(25) =44513380a(26) =87328672a(27) =171325871a(28) =336115955a(29) =659409701
External references
- oeis: A196140