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A241842 Number of simple connected graphs on n nodes that are non-integral. 14
0, 0, 1, 4, 18, 106, 846, 11095, 261056, 11716488, 1006700452 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..11.

Travis Hoppe and Anna Petrone, Encyclopedia of Finite Graphs

T. Hoppe and A. Petrone, Integer sequence discovery from small graphs, arXiv preprint arXiv:1408.3644, 2014

Eric Weisstein's World of Mathematics, Integral Graph

FORMULA

a(n) = A001349(n) - A064731(n).

CROSSREFS

Sequence in context: A020114 A009597 A241841 * A306003 A214840 A060223

Adjacent sequences:  A241839 A241840 A241841 * A241843 A241844 A241845

KEYWORD

nonn,less

AUTHOR

Travis Hoppe and Anna Petrone, Apr 29 2014

STATUS

approved

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Last modified July 16 09:13 EDT 2020. Contains 335784 sequences. (Running on oeis4.)