175466347domain: NAppears in sequencesG.f.: 12/(5 + 7*sqrt(1-24*x)).at n=7A130978Expansion of c(6*x^2)/(1-x*c(6*x^2)), where c(x) is the g.f. of A000108.at n=14A132373Number of length 2n n-ary words that can be built by repeatedly inserting doublets into the initially empty word.at n=7A294491