Number of n X 5 0..2 arrays with every 1 immediately preceded by 0 to the left or above, no 0 immediately preceded by a 0, and every 2 immediately preceded by 0 1 to the left or above.
A203178
Number of n X 5 0..2 arrays with every 1 immediately preceded by 0 to the left or above, no 0 immediately preceded by a 0, and every 2 immediately preceded by 0 1 to the left or above.
Terms
- a(0) =3a(1) =6a(2) =41a(3) =205a(4) =952a(5) =4654a(6) =23083a(7) =115377a(8) =551208a(9) =2757161a(10) =13535075a(11) =66032042a(12) =327270427a(13) =1600093371a(14) =7879616025a(15) =38759698990a(16) =190148017740a(17) =936372926748
External references
- oeis: A203178