a(n) is the total number of runs of descents over all flattened Catalan words of length n.

A372874

a(n) is the total number of runs of descents over all flattened Catalan words of length n.

Terms

    a(0) =1a(1) =4a(2) =14a(3) =50a(4) =179a(5) =632a(6) =2192a(7) =7478a(8) =25157a(9) =83660a(10) =275570a(11) =900506a(12) =2922935a(13) =9433088a(14) =30292148a(15) =96855134a(16) =308501513a(17) =979312916a(18) =3099363926a(19) =9782367362a(20) =30799928891a(21) =96758267144a(22) =303350242904a(23) =949277053190

External references