Number of 4 X n 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.
A281208
Number of 4 X n 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =0a(1) =38a(2) =168a(3) =270a(4) =470a(5) =804a(6) =1358a(7) =2284a(8) =3834a(9) =6432a(10) =10786a(11) =18080a(12) =30290a(13) =50712a(14) =84838a(15) =141812a(16) =236846a(17) =395228a(18) =658966a(19) =1097796a(20) =1827410a(21) =3039624a(22) =5052282a(23) =8391768a(24) =13929370a(25) =23106544a(26) =38306878a(27) =63470044a(28) =105104774a(29) =173959572
External references
- oeis: A281208