The number of staircase polygons with a staircase hole counted by the outer half-perimeter only.
A173408
The number of staircase polygons with a staircase hole counted by the outer half-perimeter only.
Terms
- a(0) =1a(1) =14a(2) =127a(3) =958a(4) =6601a(5) =43698a(6) =287507a(7) =1929706a(8) =13486531a(9) =99571340a(10) =782211324a(11) =6539607380a(12) =57901173453a(13) =538952965192
External references
- oeis: A173408