OFFSET
0,2
EXAMPLE
a(3) = 6 counts numbers { 0, 1/3, 1/2, 2/3, 5/6, 1 }, each of which is can be represented as the sum of reciprocals 1/1, 1/2, and 1/3.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Max Alekseyev, May 22 2012
EXTENSIONS
a(24)-a(25) from Dexter Senft, Feb 07 2019
STATUS
approved