Total number of size 2 lists in all sets of lists partitioning [n] (cf. A000262).
A351825
Total number of size 2 lists in all sets of lists partitioning [n] (cf. A000262).
Terms
- a(0) =0a(1) =0a(2) =2a(3) =6a(4) =36a(5) =260a(6) =2190a(7) =21042a(8) =226856a(9) =2709576a(10) =35491770a(11) =505620830a(12) =7780224012a(13) =128555409996
External references
- oeis: A351825