Number of 2Xn integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors exactly one smaller than itself.
A266132
Number of 2Xn integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors exactly one smaller than itself.
Terms
- a(0) =1a(1) =9a(2) =25a(3) =49a(4) =149a(5) =625a(6) =2141a(7) =5433a(8) =17269a(9) =65249a(10) =214877a(11) =600025a(12) =1934485a(13) =6961153a(14) =22488637a(15) =66171721a(16) =214994149a(17) =746222545a(18) =2392193165a(19) =7273608601a(20) =23705004725a(21) =80233190113a(22) =256613628509a(23) =797094034921
External references
- oeis: A266132