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A348240 a(n) = Sum_{k = 1..floor(n/2)} A003041(n-2*k). 1
1, 2, 8, 26, 100 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

H. Sharp, Jr., Enumeration of vacuously transitive relations, Discrete Math. 4 (1973), 185-196.

CROSSREFS

Cf. A003041.

Sequence in context: A129368 A357221 A281345 * A128238 A110156 A295934

Adjacent sequences: A348237 A348238 A348239 * A348241 A348242 A348243

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Oct 13 2021

STATUS

approved

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Last modified February 4 12:52 EST 2023. Contains 360055 sequences. (Running on oeis4.)