OFFSET
0,5
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..50
Andrew Howroyd, PARI Program, Jan 2022.
R. W. Robinson, Counting digraphs with restrictions on the strong components, Combinatorics and Graph Theory '95 (T.-H. Ku, ed.), World Scientific, Singapore (1995), 343-354.
Wikipedia, Strongly connected component
PROG
(PARI) A350489seq(15) \\ See Links for program code.
CROSSREFS
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Jan 01 2022
STATUS
approved