Number of n X 3 0..1 arrays with each 1 adjacent to 1, 3 or 5 king-move neighboring 1s.

A296947

Number of n X 3 0..1 arrays with each 1 adjacent to 1, 3 or 5 king-move neighboring 1s.

Terms

    a(0) =3a(1) =16a(2) =45a(3) =135a(4) =544a(5) =1765a(6) =5763a(7) =20811a(8) =70207a(9) =236330a(10) =822902a(11) =2806042a(12) =9547539a(13) =32855983a(14) =112351535a(15) =383730987a(16) =1315580367a(17) =4501742568a(18) =15396061261a(19) =52720880494a(20) =180431027632a(21) =617365998304

External references