Number of vertical dominoes in all possible tilings of a 2n X 3 grid by dominoes.
A123520
Number of vertical dominoes in all possible tilings of a 2n X 3 grid by dominoes.
Terms
- a(0) =4a(1) =28a(2) =152a(3) =744a(4) =3436a(5) =15284a(6) =66224a(7) =281424a(8) =1178196a(9) =4874444a(10) =19973192a(11) =81189688a(12) =327817404a(13) =1316035940a(14) =5257118560a(15) =20909651104a(16) =82849544868a(17) =327163551612
External references
- oeis: A123520