Number of nX4 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0 or 2 neighboring 1s.
A296331
Number of nX4 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0 or 2 neighboring 1s.
Terms
- a(0) =8a(1) =47a(2) =230a(3) =1235a(4) =6504a(5) =34224a(6) =180404a(7) =950451a(8) =5007796a(9) =26385348a(10) =139020417a(11) =732477787a(12) =3859315404a(13) =20334154462a(14) =107137610499a(15) =564492004530
External references
- oeis: A296331