Number of n X 2 0..4 arrays with each element equal to the number its horizontal and vertical neighbors unequal to itself.

A195956

Number of n X 2 0..4 arrays with each element equal to the number its horizontal and vertical neighbors unequal to itself.

Terms

    a(0) =1a(1) =1a(2) =6a(3) =5a(4) =5a(5) =14a(6) =21a(7) =29a(8) =54a(9) =93a(10) =149a(11) =254a(12) =437a(13) =733a(14) =1238a(15) =2109a(16) =3573a(17) =6046a(18) =10261a(19) =17405a(20) =29494a(21) =50013a(22) =84821a(23) =143806a(24) =243829a(25) =413469a(26) =701078a(27) =1188733a(28) =2015669a(29) =3417822

External references