OFFSET
0,2
COMMENTS
Partial sums of number of connected labeled topologies with n points. The subsequence of primes in this partial sum begins: 2, 5, and then what?
MATHEMATICA
Cases[Import["https://oeis.org/A006058/b006058.txt", "Table"], {_, _}][[All, 2]] // Accumulate (* Jean-François Alcover, Jan 01 2020 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Jonathan Vos Post, Apr 19 2010
EXTENSIONS
a(16)-a(18) from Jinyuan Wang, Feb 23 2020
STATUS
approved