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A131636 List of impossible triples {V, F, E} that satisfy Euler's equation V=E-F+2 but do not correspond to polyhedra. 0
0, 2, 0, 0, 3, 1, 1, 1, 0, 1, 2, 1, 1, 3, 2, 2, 0, 0, 2, 1, 1, 2, 2, 2, 2, 3, 3, 3, 0, 1, 3, 1, 2, 3, 2, 3, 3, 3, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

This set of triples seems to be a finite set of "graphs" that are Euler solutions but not polyhedra.

LINKS

Table of n, a(n) for n=1..39.

FORMULA

If V<4 and F<4 and E<7 and V=E-F+2: a(n) = {V(m),F(m),E(m)}

MATHEMATICA

a = Delete[Union[Flatten[Table[If[v + f - 2 - e0 == 0, {v, f, e0}, {}], {v, 0, 3}, {f, 0, 3}, {e0, 0, 6}], 2]], 1]; Flatten[a]

CROSSREFS

Cf. A130840.

Sequence in context: A303908 A082660 A134673 * A188023 A077888 A319668

Adjacent sequences:  A131633 A131634 A131635 * A131637 A131638 A131639

KEYWORD

nonn

AUTHOR

Roger L. Bagula, Sep 05 2007

EXTENSIONS

Partially edited by N. J. A. Sloane, Sep 14 2007.

STATUS

approved

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Last modified August 18 22:26 EDT 2019. Contains 326109 sequences. (Running on oeis4.)