Number of quadrangulations of a hexagon having n inner faces.

A242637

Number of quadrangulations of a hexagon having n inner faces.

Terms

    a(0) =0a(1) =0a(2) =3a(3) =14a(4) =63a(5) =294a(6) =1428a(7) =7182a(8) =37191a(9) =197340a(10) =1068795a(11) =5890248a(12) =32950148a(13) =186722424a(14) =1070140344a(15) =6194466222a(16) =36174046743a(17) =212916311160

External references