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A103442 Row sums of A103441. Number of two-colored bracelets of n beads with different sets of distances among the white beads. 1
1, 2, 4, 6, 11, 16, 27, 44, 73, 124, 199, 372, 613, 1142, 1874, 3926, 6209, 13660, 21539, 46240, 80142 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..22.

MATHEMATICA

(* see A103441 *) Table[Length[Union[(dist[f[ #1], n]&)/@Flatten[Table[ListNecklaces[n, Join[1+0*Range[i], 0*Range[n-i]], Dihedral], {i, 1, n-1}], 1]]], {n, 2, 16}]

CROSSREFS

Cf. A103441, A056342.

Sequence in context: A115269 A103692 A114921 * A238375 A056342 A094719

Adjacent sequences:  A103439 A103440 A103441 * A103443 A103444 A103445

KEYWORD

hard,nonn

AUTHOR

Wouter Meeussen, Feb 06 2005

EXTENSIONS

a(21) & a(22) from Robert G. Wilson v, Aug 09 2010

STATUS

approved

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Last modified April 22 04:04 EDT 2019. Contains 322329 sequences. (Running on oeis4.)