Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 4 or 7 king-move adjacent elements, with upper left element zero.
A298488
Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 4 or 7 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =7a(2) =20a(3) =41a(4) =178a(5) =388a(6) =628a(7) =1708a(8) =2860a(9) =4002a(10) =9979a(11) =17394a(12) =15401a(13) =63332a(14) =135334a(15) =82102a(16) =702695a(17) =2582167a(18) =1191816a(19) =17532272a(20) =141444005a(21) =38062610
External references
- oeis: A298488