Number of partitions of n-set in which number of blocks of size 2k is even (or zero) for every k.
A102759
Number of partitions of n-set in which number of blocks of size 2k is even (or zero) for every k.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =8a(5) =27a(6) =82a(7) =338a(8) =1647a(9) =7668a(10) =37779a(11) =210520a(12) =1276662a(13) =7985200a(14) =51302500a(15) =358798144a(16) =2677814900a(17) =20309850311a(18) =160547934756
External references
- oeis: A102759