Number of (partially defined) monotone maps from intervals of 1..n to 1..n.
A048775
Number of (partially defined) monotone maps from intervals of 1..n to 1..n.
Terms
- a(0) =1a(1) =7a(2) =31a(3) =121a(4) =456a(5) =1709a(6) =6427a(7) =24301a(8) =92368a(9) =352705a(10) =1352066a(11) =5200287a(12) =20058286a(13) =77558745a(14) =300540179a(15) =1166803093a(16) =4537567632a(17) =17672631881a(18) =68923264390a(19) =269128937199
External references
- oeis: A048775