Number of n X 3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,4,2,0,1 for x=0,1,2,3,4.

A196858

Number of n X 3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,4,2,0,1 for x=0,1,2,3,4.

Terms

    a(0) =1a(1) =3a(2) =7a(3) =12a(4) =26a(5) =56a(6) =113a(7) =235a(8) =490a(9) =1012a(10) =2099a(11) =4356a(12) =9026a(13) =18714a(14) =38806a(15) =80450a(16) =166797a(17) =345830a(18) =717003a(19) =1486565a(20) =3082117a(21) =6390162a(22) =13248759a(23) =27468753a(24) =56951126a(25) =118077121a(26) =244810064a(27) =507566235a(28) =1052340264a(29) =2181823742

External references