Number of 2 X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 3 neighboring 1s.

A297545

Number of 2 X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 3 neighboring 1s.

Terms

    a(0) =1a(1) =2a(2) =11a(3) =24a(4) =38a(5) =105a(6) =381a(7) =1067a(8) =2676a(9) =7533a(10) =22732a(11) =65556a(12) =183281a(13) =521969a(14) =1510877a(15) =4344326a(16) =12399075a(17) =35475604a(18) =101864678a(19) =292266497a(20) =837202865a(21) =2398735503a(22) =6877922768a(23) =19720368509a(24) =56523514608a(25) =162009389860a(26) =464424317089

External references