Number of n X n 0..1 arrays with every element equal to 0, 1, 2 or 4 king-move adjacent elements, with upper left element zero.
A297882
Number of n X n 0..1 arrays with every element equal to 0, 1, 2 or 4 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =7a(2) =20a(3) =36a(4) =114a(5) =253a(6) =433a(7) =734a(8) =1037a(9) =1882a(10) =2897a(11) =4474a(12) =4556a(13) =9490a(14) =7864a(15) =13478a(16) =31282a(17) =20470a(18) =123291a(19) =55794a(20) =102050a(21) =328168a(22) =112445
External references
- oeis: A297882