Number of Dyck paths of semilength n having maximal degree of asymmetry, namely n-1 for n>2 and 0 otherwise.

A298647

Number of Dyck paths of semilength n having maximal degree of asymmetry, namely n-1 for n>2 and 0 otherwise.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =2a(4) =2a(5) =8a(6) =16a(7) =52a(8) =134a(9) =432a(10) =1248a(11) =4104a(12) =12648a(13) =42464a(14) =136512a(15) =466568a(16) =1545566a(17) =5361632a(18) =18165184a(19) =63804952a(20) =219997832a(21) =780895392a(22) =2730730176a(23) =9780049008a(24) =34598622616a(25) =124873507904a(26) =446068180608

External references