78352domain: NAppears in sequencesNumbers k such that the period of the continued fraction for sqrt(k) contains exactly 39 ones.at n=27A031807Expansion of g.f. 1 - 2*x*(-7 - 10*x + x^2)/(x - 1)^4.at n=24A152100Number of binary words of length n with an even number of occurrences of the subword 0101.at n=17A332052