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A032175 Number of connected functions of n points with no symmetries. 1
1, 1, 2, 4, 9, 18, 42, 91, 208, 470, 1089, 2509, 5869, 13730, 32371, 76510, 181708, 432635, 1033656, 2475384, 5943395, 14299532, 34475030, 83263872, 201441431, 488092897, 1184353643, 2877611984, 7000359244, 17049288304 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..30.

C. G. Bower, Transforms (2)

FORMULA

"CHK" (necklace, identity, unlabeled) transform of A004111.

CROSSREFS

Cf. A002861.

Sequence in context: A026765 A264649 A259803 * A000678 A283877 A081490

Adjacent sequences:  A032172 A032173 A032174 * A032176 A032177 A032178

KEYWORD

nonn

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified February 23 13:38 EST 2018. Contains 299581 sequences. (Running on oeis4.)