Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,3,1,1,0 for x=0,1,2,3,4.
A197344
Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,3,1,1,0 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =1a(2) =9a(3) =17a(4) =33a(5) =89a(6) =249a(7) =553a(8) =1321a(9) =3361a(10) =8281a(11) =19801a(12) =48561a(13) =119729a(14) =292017a(15) =711473a(16) =1743129a(17) =4266529a(18) =10420753a(19) =25472041a(20) =62314921a(21) =152363161a(22) =372445401a(23) =910689521a(24) =2226903849a(25) =5444657417a(26) =13311984513a(27) =32549302369a(28) =79585485409
External references
- oeis: A197344