OFFSET
0,2
COMMENTS
Previous name was: Partial sums of A000112.
LINKS
K. K.-H. Butler and G. Markowsky, The Number of Maximal Subgroups of the Semigroup of Binary Relations, Kyungpook Math. J. Vol 12, June 1972.
FORMULA
a(n) = Sum_{i=0..n} A000112(i).
MATHEMATICA
Cases[Import["https://oeis.org/A000112/b000112.txt", "Table"], {_, _}][[All, 2]] // Accumulate (* Jean-François Alcover, Jan 01 2020 *)
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Jonathan Vos Post, Feb 16 2010
EXTENSIONS
New name from Geoffrey Critzer, May 22 2022
STATUS
approved