Weak preference orderings of n alternatives, i.e., orderings that have indifference between at least two alternatives.
A019472
Weak preference orderings of n alternatives, i.e., orderings that have indifference between at least two alternatives.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =7a(4) =51a(5) =421a(6) =3963a(7) =42253a(8) =505515a(9) =6724381a(10) =98618763a(11) =1582715773a(12) =27612565995a(13) =520631327581
External references
- oeis: A019472