Array read by antidiagonals: A(n,k) is the number of sets of nonempty subsets of a k-element set where each element appears in at most n subsets.
A330964
Array read by antidiagonals: A(n,k) is the number of sets of nonempty subsets of a k-element set where each element appears in at most n subsets.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =5a(8) =2a(9) =1a(10) =1a(11) =15a(12) =8a(13) =2a(14) =1a(15) =1a(16) =52a(17) =59a(18) =8a(19) =2a(20) =1a(21) =1a(22) =203a(23) =652a(24) =109a(25) =8a(26) =2a(27) =1a(28) =1a(29) =877
External references
- oeis: A330964