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A020496 From the ground state energy of a variant of the Hubbard Hamiltonian for 2 holes on a lattice of n sites. 0
1, 4, 19, 55, 181, 461 (list; graph; refs; listen; history; internal format)
OFFSET

4,2

CROSSREFS

Sequence in context: A122684 A122681 A174612 * A108484 A134507 A098813

Adjacent sequences:  A020493 A020494 A020495 * A020497 A020498 A020499

KEYWORD

nonn

AUTHOR

M. L. Glasser (laryg(AT)sun.mcs.clarkson.edu) and Don Matthis (Utah).

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Last modified February 16 02:51 EST 2012. Contains 205860 sequences.