Number of set partitions of {1..n} with block-medians summing to an integer.
A361911
Number of set partitions of {1..n} with block-medians summing to an integer.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =30a(5) =107a(6) =479a(7) =2249a(8) =11173a(9) =60144a(10) =351086a(11) =2171087a(12) =14138253a(13) =97097101a(14) =701820663a(15) =5303701310a(16) =41838047938a(17) =343716647215
External references
- oeis: A361911