269718819131
domain: N
Appears in sequences
- Number of ways to tile an n X n square with 1 X 1 and 2 X 2 tiles.at n=10A063443
- Number of ways to tile a 10 X n rectangle with 1 X 1 and 2 X 2 tiles.at n=10A063654
- Number of n X n binary matrices, symmetric under horizontal and vertical reflection, with no more than 1 one in any 2 X 2 subblock.at n=17A141483
- Number of n X n binary matrices, symmetric under horizontal and vertical reflection, with no more than 1 one in any 2 X 2 subblock.at n=20A141483