Number of nX3 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 0 vertically.

A207237

Number of nX3 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 0 vertically.

Terms

    a(0) =6a(1) =36a(2) =102a(3) =287a(4) =882a(5) =2491a(6) =6759a(7) =18528a(8) =50244a(9) =134284a(10) =357919a(11) =951428a(12) =2517507a(13) =6644999a(14) =17514496a(15) =46087746a(16) =121122382a(17) =318060011a(18) =834615854a(19) =2188807497a(20) =5737757291a(21) =15035923244a(22) =39391026514a(23) =103174230894a(24) =270192214787

External references