OFFSET
1,4
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..200
EXAMPLE
a(5) = 4 subsets: {1}, {4}, {3, 5} and {3, 4, 5}.
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Jan 22 2024
EXTENSIONS
a(24)-a(38) from Alois P. Heinz, Jan 22 2024
STATUS
approved