Number of derangements up to cyclic rotations; permutation siteswap necklaces, with no fixed points (no "zero-throws", i.e., empty hands, if we use the mapping Perm2SiteSwap1 of A060495 and A060498).
A064636
Number of derangements up to cyclic rotations; permutation siteswap necklaces, with no fixed points (no "zero-throws", i.e., empty hands, if we use the mapping Perm2SiteSwap1 of A060495 and A060498).
Terms
- a(0) =0a(1) =0a(2) =1a(3) =2a(4) =5a(5) =12a(6) =55a(7) =270a(8) =1893a(9) =14864a(10) =133749a(11) =1334970a(12) =14687195a(13) =176214852a(14) =2290820923a(15) =32071104006a(16) =481066907653
External references
- oeis: A064636