Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,1,2,4 for x=0,1,2,3,4.
A196212
Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,1,2,4 for x=0,1,2,3,4.
Terms
- a(0) =3a(1) =9a(2) =20a(3) =61a(4) =189a(5) =544a(6) =1629a(7) =4973a(8) =15040a(9) =45739a(10) =140129a(11) =429448a(12) =1318027a(13) =4054639a(14) =12485046a(15) =38469569a(16) =118629261a(17) =366006920a(18) =1129623099a(19) =3487480563a(20) =10769378230a(21) =33261326067a(22) =102741225843a(23) =317390237024a(24) =980560274021
External references
- oeis: A196212