Number of set partitions of [2n] with symmetric block size list of length n.

A275283

Number of set partitions of [2n] with symmetric block size list of length n.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =19a(4) =171a(5) =2066a(6) =31346a(7) =559987a(8) =11954993a(9) =282835456a(10) =7785919355a(11) =229359684137

External references