Number of sets of nonempty non-singleton subsets of {1..n} satisfying a strict version of the axiom of choice.
A367770
Number of sets of nonempty non-singleton subsets of {1..n} satisfying a strict version of the axiom of choice.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =15a(4) =558a(5) =81282a(6) =39400122a(7) =61313343278
External references
- oeis: A367770