146484375

Appears in sequences

• Expansion of g.f. (1 - 2*x)/(1 - 5*x).at n=12A005053
• a(n) = 5^(n/2) for n even, a(n) = 3*5^((n-1)/2) for n odd.at n=23A056487
• Reciprocal of n terminates with an infinite repetition of digit 6. Multiples of 10 are omitted.at n=18A064565
• Expansion of (1 + 3x - 2x^2 - 12x^3)/(1 - 9x^2 + 20x^4).at n=23A097111
• a(1) = 1, a(2) = 3; for n >= 3, take a(n) to be the smallest odd number not occurring earlier such that a(n-1) divides the concatenation a(n-2)a(n).at n=23A111386
• a(3*n) = 3*a(3*n-1)-3*a(3*n-2)+2*a(3*n-3), a(3*n+1) = 3*a(3*n)-3*a(3*n-1)+2*a(3*n-2), a(3*n+2) = 3*a(3*n+1)-3*a(3*n) with a(0)=1, a(1)=2, a(2)=3.at n=35A133335
• a(n) = 5*a(n-2) for n > 2; a(1) = 3, a(2) = 5.at n=22A163114
• Numbers that are equal to the arithmetic derivative of their cototient.at n=20A248817
• Expansion of 1/(1-x*sqrt(4*x^2+1)-2*x^2).at n=24A249512
• Hypotenuses for which there exist exactly 11 distinct integer triangles.at n=2A290501
• a(n) = floor(d(n) * n^(11/2)) where d(n) is the number of divisors of n.at n=24A321303