Number of nX4 0..1 arrays with each 1 adjacent to 2, 4 or 5 king-move neighboring 1s.
A296970
Number of nX4 0..1 arrays with each 1 adjacent to 2, 4 or 5 king-move neighboring 1s.
Terms
- a(0) =1a(1) =21a(2) =78a(3) =274a(4) =1418a(5) =6573a(6) =29590a(7) =140427a(8) =665654a(9) =3151207a(10) =15051798a(11) =72121126a(12) =346235034a(13) =1666584401a(14) =8036053901a(15) =38798502247a(16) =187532267289a(17) =907211512520
External references
- oeis: A296970