Number of nX3 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 2 or 4 neighboring 1s.

A296630

Number of nX3 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 2 or 4 neighboring 1s.

Terms

    a(0) =5a(1) =19a(2) =71a(3) =260a(4) =966a(5) =3581a(6) =13275a(7) =49209a(8) =182422a(9) =676247a(10) =2506882a(11) =9293135a(12) =34450119a(13) =127708318a(14) =473421137a(15) =1754995884a(16) =6505857719a(17) =24117540693a(18) =89404932324a(19) =331428565852

External references