OFFSET
0,32
COMMENTS
Also the number of ways to express an integer as the sum of distinct unit fractions such that the sum of the denominators is n.
LINKS
EXAMPLE
a(31) = 2 because we have 2 + 4 + 5 + 20 = 1 + 2 + 3 + 10 + 15 = 31 and 1/2 + 1/4 + 1/5 + 1/20 = 1, 1/1 + 1/2 + 1/3 + 1/10 + 1/15 = 2 are integers.
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Dec 10 2020
STATUS
approved