69128

Appears in sequences

• Numbers n such that n is a substring of its square in base 7 (written in base 10).at n=15A018831
• The length of Sapro's necklace at successive years in Werneck's Black Pearl Necklace problem.at n=25A140261
• Expansion of (1/(1-x))*c(x/((1-x)*(1-x^2))) where c(x) is the g.f. of A000108.at n=9A188314