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A045610 Number of different energy states of n positive and n negative charges on a string. 1
1, 1, 3, 7, 23, 71, 252, 890, 3299, 12274 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..9.

CROSSREFS

Cf. A045723.

Sequence in context: A194691 A148703 A302180 * A045723 A140456 A066768

Adjacent sequences:  A045607 A045608 A045609 * A045611 A045612 A045613

KEYWORD

nonn

AUTHOR

Wouter Meeussen

STATUS

approved

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Last modified March 24 01:20 EDT 2019. Contains 321444 sequences. (Running on oeis4.)