Not necessarily symmetric n X 4 crossword puzzle grids.
A034187
Not necessarily symmetric n X 4 crossword puzzle grids.
Terms
- a(0) =1a(1) =39a(2) =649a(3) =7943a(4) =86995a(5) =910667a(6) =9339937a(7) =94844591a(8) =958363411a(9) =9659847433a(10) =97245624749a(11) =978360244839
External references
- oeis: A034187