A320996 - OEIS

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A320996

Extremal values of Euler characteristics of polytopes.

1, 1, 0, -2, -5, -9, -14, -34, -69, -125, -209, -461 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,4`
	LINKS	`Table of n, a(n) for n=1..12.` `H. Hadwiger and P. Mani, On polyhedra with extremal Euler characteristic, J. Combin. Theory, A 17 (1974), 345-349. See p. 346.`
	CROSSREFS	`Cf. A006481.` `Sequence in context: A071609 A068501 A048071 * A051892 A006599 A013933` `Adjacent sequences: A320993 A320994 A320995 * A320997 A320998 A320999`
	KEYWORD	`sign,more`
	AUTHOR	`N. J. A. Sloane, Oct 26 2018`
	STATUS	`approved`

Last modified January 26 10:49 EST 2021. Contains 340438 sequences. (Running on oeis4.)