login
A174137
Partial sums of A006905.
0
1, 3, 16, 187, 4181, 158484, 9573673, 887796203, 123095499826, 25013843421773, 7332464142932061, 3060854010476035118, 1800064413234246359355, 1477862758280253372432667, 1680717420907850482529235664
OFFSET
0,2
COMMENTS
Partial sums of number of transitive relations on n labeled nodes. After 3, none of the values shown is prime.
FORMULA
a(n) = Sum_{i=0..n} A006905(i).
CROSSREFS
KEYWORD
nonn
AUTHOR
Jonathan Vos Post, Mar 09 2010
STATUS
approved