Number of linear intervals in the Tamari lattices.

Terms

a(0) =1a(1) =3a(2) =12a(3) =49a(4) =198a(5) =792a(6) =3146a(7) =12441a(8) =49062a(9) =193154a(10) =759696a(11) =2986458a(12) =11737820a(13) =46134090a(14) =181350630a(15) =713046345a(16) =2804421510a(17) =11033453970a(18) =43424181240a(19) =170965500030a(20) =673354218420