%I A020496
%S A020496 1,4,19,55,181,461
%N A020496 From the ground state energy of a variant of the Hubbard Hamiltonian 
               for 2 holes on a lattice of n sites.
%Y A020496 Sequence in context: A166808 A122684 A122681 this_sequence A108484 A134507 
               A098813
%Y A020496 Adjacent sequences: A020493 A020494 A020495 this_sequence A020497 A020498 
               A020499
%K A020496 nonn
%O A020496 4,2
%A A020496 M. L. Glasser (laryg(AT)sun.mcs.clarkson.edu) and Don Matthis (Utah).