Number of 2 X n 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally, with no adjacent elements equal.

A232336

Number of 2 X n 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally, with no adjacent elements equal.

Terms

    a(0) =1a(1) =6a(2) =18a(3) =32a(4) =82a(5) =162a(6) =388a(7) =806a(8) =1858a(9) =3968a(10) =8962a(11) =19426a(12) =43396a(13) =94822a(14) =210578a(15) =462112a(16) =1022994a(17) =2250178a(18) =4972804a(19) =10951878a(20) =24180994a(21) =53291008a(22) =117604738a(23) =259275842a(24) =572028164a(25) =1261360966a(26) =2782483346a(27) =6136209184a(28) =13535050578a(29) =29850527586

External references