1,4

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

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

Sequence in context: A020114 A009597 A241841 * A306003 A214840 A060223

Adjacent sequences: A241839 A241840 A241841 * A241843 A241844 A241845

nonn,less

Travis Hoppe and Anna Petrone, Apr 29 2014

approved