369 Octominoes
Jump to navigation
Jump to search
Theorem
There exist $369$ distinct free octominoes, $6$ of which have a hole:
Proof
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $35$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $35$