Number of nX1 0..7 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.
A202909
Number of nX1 0..7 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.
Terms
- a(0) =1a(1) =8a(2) =64a(3) =372a(4) =1856a(5) =9052a(6) =45648a(7) =235538a(8) =1215616a(9) =6233356a(10) =31868448a(11) =163014678a(12) =834763824a(13) =4276077566a(14) =21900661172a(15) =112149148911a(16) =574278200480
External references
- oeis: A202909