Number of ordered set partitions of {1, ..., n} with no singletons or cyclical adjacencies (successive elements in the same block, where 1 is a successor of n).
A306416
Number of ordered set partitions of {1, ..., n} with no singletons or cyclical adjacencies (successive elements in the same block, where 1 is a successor of n).
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =2a(5) =0a(6) =26a(7) =84a(8) =950a(9) =6000a(10) =62522a(11) =556116a(12) =6259598a(13) =69319848a(14) =874356338a(15) =11384093196a(16) =161462123894
External references
- oeis: A306416