Exponential transform of (A000275 number of pairs of permutations with rise/rise forbidden).
A188489
Exponential transform of (A000275 number of pairs of permutations with rise/rise forbidden).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =8a(4) =61a(5) =797a(6) =16021a(7) =457285a(8) =17529203a(9) =867230231a(10) =53745914922
External references
- oeis: A188489