OFFSET
1,2
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
FORMULA
Sum_{n>=1} 1/a(n) = (5*8)/((5-1)*(8-1)) = 10/7. - Amiram Eldar, Sep 25 2020
a(n) ~ exp(sqrt(2*log(5)*log(8)*n)) / sqrt(40). - Vaclav Kotesovec, Sep 25 2020
MATHEMATICA
n = 10^6; Flatten[Table[5^i*8^j, {i, 0, Log[5, n]}, {j, 0, Log[8, n/5^i]}]] // Sort (* Amiram Eldar, Sep 25 2020 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
STATUS
approved