Number of ordered set partitions of [n] into five blocks such that equal-sized blocks are ordered with increasing least elements.
A285920
Number of ordered set partitions of [n] into five blocks such that equal-sized blocks are ordered with increasing least elements.
Terms
- a(0) =1a(1) =75a(2) =1225a(3) =15750a(4) =152355a(5) =1049895a(6) =8130925a(7) =51541050a(8) =305751160a(9) =1721589870a(10) =10370592050a(11) =54481859250a(12) =292852136335
External references
- oeis: A285920