

A007122


Number of unlabeled identity connected unit interval graphs with n nodes.
(Formerly M1288)


2



0, 0, 0, 0, 0, 2, 4, 15, 36, 108, 276, 770, 2036, 5586, 15072, 41370, 113184, 312488, 863824, 2401344, 6692368, 18724990, 52531788, 147824963, 417006316, 1179285900, 3342274092, 9492427854, 27011049612, 76999988534
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OFFSET

1,6


REFERENCES

R. W. Robinson, personal communication.
R. W. Robinson, Numerical implementation of graph counting algorithms, AGRC Grant, Math. Dept., Univ. Newcastle, Australia, 1980.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).


LINKS



CROSSREFS



KEYWORD

nonn,nice


AUTHOR



STATUS

approved



