Sum of n-th Bell number and n-th Bell number written backwards.
A322924
Sum of n-th Bell number and n-th Bell number written backwards.
Terms
- a(0) =2a(1) =2a(2) =4a(3) =10a(4) =66a(5) =77a(6) =505a(7) =1655a(8) =4554a(9) =95259a(10) =695486a(11) =754446a(12) =12166721a(13) =101089109a(14) =414897413a(15) =6841551376a(16) =84604250548a(17) =123761716632
External references
- oeis: A322924