83979

Appears in sequences

• Numbers k such that k^2 is palindromic in base 6.at n=28A029990
• Expansion of g.f. x^2*(1+4*x-3*x^2)/((1-x)^2*(1-2*x)*(1-3*x)).at n=10A187693
• Numbers k such that k and k+1 have at least 4 but not both exactly 4 distinct prime factors.at n=18A321494