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A001436
Number of connected graphs with n nodes, n+2 edges.
3
0, 0, 0, 1, 4, 22, 107, 486, 2075, 8548, 33851, 130365, 489387, 1799700, 6499706, 23118465, 81134475, 281454170, 966388692, 3288208176, 11098235911, 37188198356, 123800999503, 409715126169, 1348690034859, 4417932007626, 14407260221164
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OFFSET
1,5
REFERENCES
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
Sean A. Irvine,
Table of n, a(n) for n = 1..40
M. L. Stein and P. R. Stein,
Enumeration of Linear Graphs and Connected Linear Graphs up to p = 18 Points
. Report LA-3775, Los Alamos Scientific Laboratory of the University of California, Los Alamos, NM, Oct 1967.
CROSSREFS
A diagonal of
A054923
.
Sequence in context:
A099013
A184510
A184701
*
A224243
A024420
A220457
Adjacent sequences:
A001433
A001434
A001435
*
A001437
A001438
A001439
KEYWORD
nonn
AUTHOR
N. J. A. Sloane
EXTENSIONS
Description corrected Aug 02 1996.
More terms from
Sean A. Irvine
, Jul 23 2012
STATUS
approved
