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

A196431

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

Terms

    a(0) =3a(1) =9a(2) =25a(3) =75a(4) =213a(5) =621a(6) =1801a(7) =5219a(8) =15133a(9) =43867a(10) =127195a(11) =368759a(12) =1069105a(13) =3099583a(14) =8986391a(15) =26053581a(16) =75535111a(17) =218993223a(18) =634910491a(19) =1840747761a(20) =5336740123a(21) =15472405305a(22) =44857970049a(23) =130053306249a(24) =377053674603

External references