A032070 - OEIS

%I #7 Mar 30 2012 17:37:01

%S 3,6,54,864,12960,252720,5307120,130636800,3527193600,106697606400,

%T 3521021011200,127105948569600,4957131994214400,208390202679859200,

%U 9377559120593664000,450260112212951040000

%N Number of reversible strings with n labeled beads of 3 colors, no palindromes of more than 1 bead.

%H C. G. Bower, <a href="/transforms2.html">Transforms (2)</a>

%F "BHJ" (reversible, identity, labeled) transform of 3, 0, 0, 0...

%F n! * A032086.

%K nonn

%O 1,1

%A _Christian G. Bower_