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A045612 Number of different energy states between two stacked necklaces, each of n positive and n negative charges. 2
1, 2, 5, 18, 71, 538, 2619, 33052, 233613, 3153926, 24581647 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

For this sequence, only the distances between the two necklaces are taken into account (that is, distances within a necklace are ignored). - Sean A. Irvine, Mar 18 2021

LINKS

Table of n, a(n) for n=0..10.

Sean A. Irvine, Java program (github)

Index entries for sequences related to necklaces

CROSSREFS

Cf. A045611.

Sequence in context: A268570 A141494 A189843 * A103940 A162543 A039744

Adjacent sequences:  A045609 A045610 A045611 * A045613 A045614 A045615

KEYWORD

nonn,more

AUTHOR

Wouter Meeussen

EXTENSIONS

a(6)-a(10) from Sean A. Irvine, Mar 18 2021

STATUS

approved

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Last modified May 21 09:30 EDT 2022. Contains 353908 sequences. (Running on oeis4.)