OFFSET
1,2
LINKS
Vincent Pilaud, Viviane Pons, The Hopf algebra of integer binary relations, arXiv:1807.03277 [math.CO], 2018. See Table 2 p.8.
FORMULA
a(n) <= A053763(n).
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Michel Marcus, Jul 09 2018
STATUS
approved