Number of solid standard Young tableaux of n cells and height <= 2.

A215087

Number of solid standard Young tableaux of n cells and height <= 2.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =8a(4) =26a(5) =92a(6) =372a(7) =1566a(8) =7086a(9) =33550a(10) =167504a(11) =873226a(12) =4764614a(13) =26947632a(14) =157926628a(15) =954523378a(16) =5945067490a(17) =38060781922a(18) =250345198424

External references