Number of partitions of n-set into "lists", in which every even list appears an even number of times, cf. A000262.
A102760
Number of partitions of n-set into "lists", in which every even list appears an even number of times, cf. A000262.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =7a(4) =37a(5) =241a(6) =1381a(7) =13231a(8) =140617a(9) =1483777a(10) =16211881a(11) =217551511a(12) =3384215341a(13) =50221272817a(14) =782154787597
External references
- oeis: A102760