Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 1 1 vertically.

A207847

Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 1 1 vertically.

Terms

    a(0) =10a(1) =100a(2) =240a(3) =780a(4) =2320a(5) =7140a(6) =21600a(7) =65980a(8) =200400a(9) =610740a(10) =1857520a(11) =5656380a(12) =17211840a(13) =52396900a(14) =159466800a(15) =485403660a(16) =1477389520a(17) =4496881380a(18) =13687155360a(19) =41660429500a(20) =126802853520a(21) =385955704500

External references