Number of partitions of {1,..,n} into lists with an even number of lists of size 1, where a list means an ordered subset (cf. A000262).

A111752

Number of partitions of {1,..,n} into lists with an even number of lists of size 1, where a list means an ordered subset (cf. A000262).

Terms

    a(0) =1a(1) =0a(2) =3a(3) =6a(4) =49a(5) =300a(6) =2491a(7) =22890a(8) =239457a(9) =2782584a(10) =35595091a(11) =496577070a(12) =7499663953a(13) =121855323876

External references