Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 1 and 1 0 1 vertically.
A207265
Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 1 and 1 0 1 vertically.
Terms
- a(0) =9a(1) =81a(2) =217a(3) =611a(4) =1910a(5) =5132a(6) =13067a(7) =33937a(8) =86899a(9) =218763a(10) =551672a(11) =1390836a(12) =3491934a(13) =8760137a(14) =21976254a(15) =55062713a(16) =137841712a(17) =344913621a(18) =862466304a(19) =2155128256a(20) =5382374565a(21) =13435295369a(22) =33519373349a(23) =83589288631a(24) =208367881512
External references
- oeis: A207265