Number of Schroeder paths of semilength n in which there are no (2,0)-steps at level 1.
A224071
Number of Schroeder paths of semilength n in which there are no (2,0)-steps at level 1.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =15a(4) =52a(5) =201a(6) =841a(7) =3726a(8) =17213a(9) =82047a(10) =400600a(11) =1993377a(12) =10071777a(13) =51532938a(14) =266462229a(15) =1390174911a(16) =7308741084a(17) =38682855225a(18) =205940368441
External references
- oeis: A224071