OFFSET
1,2
COMMENTS
Partial sums of number of transitive permutation groups of degree n. The subsequence of primes in this partial sum begins: 2, 37, 547, 4723. The subsequence of squares in this partial sum begins: 1, 4, 9, 121, 484.
FORMULA
a(n) = Sum_{i=1..n} A002106(i).
MATHEMATICA
Cases[Import["https://oeis.org/A002106/b002106.txt", "Table"], {_, _}][[All, 2]] // Accumulate (* Jean-François Alcover, Jan 03 2020 *)
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Jonathan Vos Post, Feb 17 2010
EXTENSIONS
More terms from Jinyuan Wang, Feb 23 2020
More terms from Vaclav Kotesovec, Jul 18 2022
STATUS
approved