Total number of ordered k-tuples (k=0..n) of distinct elements from an n-element set: a(n) = Sum_{k=0..n} n!/k!.
A000522
Total number of ordered k-tuples (k=0..n) of distinct elements from an n-element set: a(n) = Sum_{k=0..n} n!/k!.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =16a(4) =65a(5) =326a(6) =1957a(7) =13700a(8) =109601a(9) =986410a(10) =9864101a(11) =108505112a(12) =1302061345a(13) =16926797486a(14) =236975164805
External references
- oeis: A000522