Number of set partitions of {1, ..., n} that avoid 6-nestings.

A192127

Number of set partitions of {1, ..., n} that avoid 6-nestings.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =52a(6) =203a(7) =877a(8) =4140a(9) =21147a(10) =115975a(11) =678570a(12) =4213596a(13) =27644383a(14) =190897649a(15) =1382919174a(16) =10479355676a(17) =82850735298a(18) =681840170501

External references