3662109375

Appears in sequences

• Expansion of g.f. (1 - 2*x)/(1 - 5*x).at n=14A005053
• a(n) = 5^(n/2) for n even, a(n) = 3*5^((n-1)/2) for n odd.at n=27A056487
• Reciprocal of n terminates with an infinite repetition of digit 6. Multiples of 10 are omitted.at n=21A064565
• Expansion of (1 + 3x - 2x^2 - 12x^3)/(1 - 9x^2 + 20x^4).at n=27A097111
• 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=27A111386
• a(n) = 5*a(n-2) for n > 2; a(1) = 3, a(2) = 5.at n=26A163114