Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,3,4,1 for x=0,1,2,3,4.

A196206

Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,3,4,1 for x=0,1,2,3,4.

Terms

    a(0) =5a(1) =11a(2) =14a(3) =35a(4) =70a(5) =136a(6) =305a(7) =611a(8) =1321a(9) =2832a(10) =6041a(11) =12936a(12) =27706a(13) =59515a(14) =128053a(15) =275195a(16) =591576a(17) =1272021a(18) =2736374a(19) =5887462a(20) =12665855a(21) =27247361a(22) =58620223a(23) =126125420a(24) =271372681a(25) =583876552a(26) =1256241214a(27) =2702904009a(28) =5815589949

External references