Number of n X 2 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 2 or 3 neighboring 1s.
A296582
Number of n X 2 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 2 or 3 neighboring 1s.
Terms
- a(0) =3a(1) =9a(2) =22a(3) =62a(4) =172a(5) =480a(6) =1358a(7) =3849a(8) =10951a(9) =31232a(10) =89193a(11) =254996a(12) =729509a(13) =2087983a(14) =5978057a(15) =17119192a(16) =49030629a(17) =140440575a(18) =402295454a(19) =1152434018a(20) =3301409215a(21) =9457817513a(22) =27094931531a(23) =77622729861a(24) =222378228416a(25) =637084878266
External references
- oeis: A296582