Number of n X 4 binary arrays with top left value 1 and no two ones adjacent horizontally, vertically, diagonally or antidiagonally.
A228502
Number of n X 4 binary arrays with top left value 1 and no two ones adjacent horizontally, vertically, diagonally or antidiagonally.
Terms
- a(0) =3a(1) =5a(2) =29a(3) =87a(4) =358a(5) =1252a(6) =4749a(7) =17285a(8) =64235a(9) =236211a(10) =873250a(11) =3219652a(12) =11886927a(13) =43856285a(14) =161862005a(15) =597285195a(16) =2204231074a(17) =8134165648a(18) =30017792409a(19) =110774426621a(20) =408792375587
External references
- oeis: A228502