Large Schröder numbers (or large Schroeder numbers, or big Schroeder numbers).

A006318

Large Schröder numbers (or large Schroeder numbers, or big Schroeder numbers).

Terms

    a(0) =1a(1) =2a(2) =6a(3) =22a(4) =90a(5) =394a(6) =1806a(7) =8558a(8) =41586a(9) =206098a(10) =1037718a(11) =5293446a(12) =27297738a(13) =142078746a(14) =745387038a(15) =3937603038a(16) =20927156706a(17) =111818026018a(18) =600318853926

External references