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A316664 Number of indecomposable binary relations on [n]. 0
1, 3, 57, 3963, 1040097 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..5.

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

Cf. A053763.

Sequence in context: A012064 A012204 A000281 * A086220 A127263 A134723

Adjacent sequences:  A316661 A316662 A316663 * A316665 A316666 A316667

KEYWORD

nonn,more

AUTHOR

Michel Marcus, Jul 09 2018

STATUS

approved

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Last modified May 30 09:24 EDT 2020. Contains 334723 sequences. (Running on oeis4.)