Number of n X 2 binary arrays with every one adjacent to another one horizontally or vertically.
A202796
Number of n X 2 binary arrays with every one adjacent to another one horizontally or vertically.
Terms
- a(0) =2a(1) =10a(2) =36a(3) =126a(4) =454a(5) =1632a(6) =5854a(7) =21010a(8) =75412a(9) =270662a(10) =971438a(11) =3486624a(12) =12513958a(13) =44914250a(14) =161203204a(15) =578579694a(16) =2076599286a(17) =7453190368a(18) =26750489166a(19) =96011055010a(20) =344596415668
External references
- oeis: A202796