|
%I #10 Dec 15 2017 17:34:48
%S 1,52,5133,656880,97772875,16032938340,2812609211657,518547356184000,
%T 99318297529004400,19605670296090989500,3966181169996511862429,
%U 818782296743542722132528,171938262068874336023196923
%N Number of Lyndon words (aperiodic necklaces) with 4n beads of 4 colors, n beads of each color. One color labeled, the other 3 unlabeled.
%H <a href="/index/Lu#Lyndon">Index entries for sequences related to Lyndon words</a>
%F 1/(24n) * sum over d|n of {mu(n/d) * (4d)! / d!^4}.
%o (PARI) for(n=1,23,print(1/(24*n)*sumdiv(n,d,moebius(n/d)*(4*d)!/d!^4)))
%Y Inverse Witt transform of A006179.
%K nonn
%O 1,2
%A Lionel Levine (levine(AT)ultranet.com)
%E More terms from _Jason Earls_, Aug 31 2001
%E Edited by _Christian G. Bower_, Aug 29 2002
| 