Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,1,0,2,4 for x=0,1,2,3,4.
A196850
Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,1,0,2,4 for x=0,1,2,3,4.
Terms
- a(0) =2a(1) =11a(2) =38a(3) =136a(4) =496a(5) =1792a(6) =6440a(7) =23306a(8) =84180a(9) =303664a(10) =1096874a(11) =3960906a(12) =14299036a(13) =51633110a(14) =186437376a(15) =673147554a(16) =2430568646a(17) =8776143806a(18) =31687921122a(19) =114416191032a(20) =413124704992
External references
- oeis: A196850