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

A372872

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

Terms

    a(0) =1a(1) =2a(2) =6a(3) =20a(4) =67a(5) =222a(6) =728a(7) =2368a(8) =7653a(9) =24602a(10) =78730a(11) =250956a(12) =797159a(13) =2524342a(14) =7971612a(15) =25110584a(16) =78918985a(17) =247518642a(18) =774840974a(19) =2421378052a(20) =7554699531a(21) =23535794702a(22) =73222472416a(23) =227512682160a(24) =706073841197

External references