Number of 2Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 1 or 3 neighboring 1s.
A297608
Number of 2Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 1 or 3 neighboring 1s.
Terms
- a(0) =4a(1) =11a(2) =35a(3) =96a(4) =281a(5) =829a(6) =2428a(7) =7059a(8) =20611a(9) =60296a(10) =176129a(11) =514221a(12) =1501988a(13) =4388011a(14) =12817075a(15) =37436160a(16) =109349737a(17) =319411997a(18) =932986892a(19) =2725199619a(20) =7960200227a(21) =23251456696a(22) =67916501713a(23) =198381124173a(24) =579463016116
External references
- oeis: A297608