Number of tilings of a 3 X 3 X n box using 3n bricks of shape 3 X 1 X 1.
A233289
Number of tilings of a 3 X 3 X n box using 3n bricks of shape 3 X 1 X 1.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =21a(4) =92a(5) =320a(6) =1213a(7) =4822a(8) =18556a(9) =70929a(10) =273808a(11) =1057020a(12) =4069737a(13) =15676666a(14) =60424640a(15) =232846801a(16) =897164316a(17) =3457096532a(18) =13321674833a(19) =51332757274a(20) =197801848744a(21) =762200458321
External references
- oeis: A233289