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A045610 Number of different energy states of n positive and n negative charges on a string. +0
2
1, 1, 3, 7, 23, 71, 252, 890, 3299, 12274 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Cf. A045723.

Sequence in context: A088704 A148702 A148703 this_sequence A045723 A140456 A066768

Adjacent sequences: A045607 A045608 A045609 this_sequence A045611 A045612 A045613

KEYWORD

nonn

AUTHOR

Wouter Meeussen (wouter.meeussen(AT)pandora.be)

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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