OFFSET
1,3
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..50 (terms 1..40 from Mikhail Tikhomirov)
Marcel et al., Is there a formula for the number of st-dags (DAG with 1 source and 1 sink) with n vertices?, MathOverflow, 2021.
PROG
(PARI) A345258seq(16) \\ See PARI link in A122078 for program code.
CROSSREFS
KEYWORD
nonn
AUTHOR
Max Alekseyev, Jun 12 2021
EXTENSIONS
a(9) from Brendan McKay.
Terms a(10) and beyond from Mikhail Tikhomirov, Jun 16 2021
STATUS
approved