Number of 1-punctured staircase polygons (by perimeter) with a hole of perimeter 6.

A055024

Number of 1-punctured staircase polygons (by perimeter) with a hole of perimeter 6.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =0a(10) =2a(11) =54a(12) =717a(13) =6836a(14) =53696a(15) =371464a(16) =2349981a(17) =13915712a(18) =78331106a(19) =423642906a(20) =2218481677a(21) =11313458780a(22) =56431232688a(23) =276253783984

External references