Number of n X 3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 4 neighboring 1s.
A297577
Number of n X 3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 4 neighboring 1s.
Terms
- a(0) =3a(1) =11a(2) =36a(3) =102a(4) =370a(5) =1243a(6) =3854a(7) =13078a(8) =43861a(9) =141109a(10) =468638a(11) =1561065a(12) =5101698a(13) =16842125a(14) =55830567a(15) =183595621a(16) =605376713a(17) =2001499842a(18) =6596762626a(19) =21752445702a(20) =71828204711a(21) =236917416288a(22) =781388833534
External references
- oeis: A297577