Number of blocks of size >1 in all partitions of an n-set.
A124325
Number of blocks of size >1 in all partitions of an n-set.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =4a(4) =17a(5) =76a(6) =362a(7) =1842a(8) =9991a(9) =57568a(10) =351125a(11) =2259302a(12) =15288000a(13) =108478124a(14) =805037105a(15) =6233693772a(16) =50257390937a(17) =421049519856
External references
- oeis: A124325