Number of different ways a grasshopper can take n hops without landing on the same point more than once.

A321535

Number of different ways a grasshopper can take n hops without landing on the same point more than once.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =4a(7) =7a(8) =9a(9) =14a(10) =23a(11) =35a(12) =56a(13) =86a(14) =136a(15) =216a(16) =338a(17) =535a(18) =848a(19) =1374a(20) =2234a(21) =3594a(22) =5750a(23) =9265a(24) =14856a(25) =24019a(26) =39350a(27) =64222a(28) =104878a(29) =170247

External references