Number of permutations p of [n] whose absolute displacements |p(i)-i| are Fibonacci numbers.
A324373
Number of permutations p of [n] whose absolute displacements |p(i)-i| are Fibonacci numbers.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =78a(6) =362a(7) =1473a(8) =5657a(9) =30045a(10) =150862a(11) =690604a(12) =3048236a(13) =14043152a(14) =84667280a(15) =484698208a(16) =2661357616a(17) =13753927840a(18) =73080151824a(19) =374413073328
External references
- oeis: A324373