Number of n X 2 binary arrays with each 1 adjacent to exactly one 0 vertically and one 0 horizontally.
A183344
Number of n X 2 binary arrays with each 1 adjacent to exactly one 0 vertically and one 0 horizontally.
Terms
- a(0) =1a(1) =7a(2) =9a(3) =17a(4) =33a(5) =59a(6) =109a(7) =201a(8) =369a(9) =679a(10) =1249a(11) =2297a(12) =4225a(13) =7771a(14) =14293a(15) =26289a(16) =48353a(17) =88935a(18) =163577a(19) =300865a(20) =553377a(21) =1017819a(22) =1872061a(23) =3443257a(24) =6333137a(25) =11648455a(26) =21424849a(27) =39406441a(28) =72479745a(29) =133311035
External references
- oeis: A183344