Number of standard puzzles of shape 2 X n with support CK (see reference for precise definition).
A196265
Number of standard puzzles of shape 2 X n with support CK (see reference for precise definition).
Terms
- a(0) =1a(1) =2a(2) =4a(3) =8a(4) =26a(5) =66a(6) =276a(7) =816a(8) =4050a(9) =13410a(10) =75780a(11) =274680a(12) =1723050a(13) =6735330a(14) =46104660a(15) =192296160a(16) =1418802210a(17) =6264006210a(18) =49355252100a(19) =229233450600
External references
- oeis: A196265