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

A275293

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

Terms

    a(0) =1a(1) =13a(2) =171a(3) =2306a(4) =31795a(5) =446349a(6) =6357295a(7) =91615780a(8) =1333116522a(9) =19555739050a(10) =288834920011

External references