181837

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 44.at n=11A031632
• Number of integers m in [0..10^n-1] such that m has no digit in common with the last n digits of either m^2 or m^3.at n=17A256714
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 547", based on the 5-celled von Neumann neighborhood.at n=8A272839
• Primes p such that the sum of digits of 11*p is 11.at n=20A357935
• Prime numbersat n=16478