5859375

Appears in sequences

• Numbers that are the sum of 3 positive 9th powers.at n=34A003392
• Expansion of g.f. (1 - 2*x)/(1 - 5*x).at n=10A005053
• Smallest label f(T) given to a rooted tree T with n nodes in Matula-Goebel labeling.at n=29A005517
• a(n) = 5^(n/2) for n even, a(n) = 3*5^((n-1)/2) for n odd.at n=19A056487
• Reciprocal of n terminates with an infinite repetition of digit 6. Multiples of 10 are omitted.at n=14A064565
• Expansion of (1 + 3x - 2x^2 - 12x^3)/(1 - 9x^2 + 20x^4).at n=19A097111
• 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=19A111386
• 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=29A133335
• a(4*n)=5^n, a(4*n+1)=2*5^n, a(4*n+2)=3*5^n, a(4*n+3)=4*5^n.at n=38A140730
• a(n) = 5*a(n-2) for n > 2; a(1) = 3, a(2) = 5.at n=18A163114
• a(n) = n^9*(n + 1)/2.at n=5A170783
• a(n) = (n/4)*5^(n/2)*((1+sqrt(5))^2+(-1)^n*(1-sqrt(5))^2).at n=15A187275
• Numbers that divide the concatenation of their aliquot divisors, in ascending order.at n=29A240265
• Expansion of 1/(1-x*sqrt(4*x^2+1)-2*x^2).at n=20A249512
• Number of set partitions of [n] such that i-j is a multiple of nine for all i,j belonging to the same block.at n=28A275076
• Hypotenuses for which there exist exactly 9 distinct integer triangles.at n=2A290500