A013641 f-vector for simplicial polytope providing counterexample to unimodality conjecture.

1, 1320, 869619, 24650747, 342491792, 3070918789, 19918328394, 99465082767, 397591643442, 1306188319799, 3593770140180, 8397239870111, 16843753477928, 29259588507633, 44370698483306, 59263421467414, 70604148959649, 76609321169592, 78245589858777, 78245589349944, 78245589350797, 76598891788386, 69592677861523, 55485099387534, 37137014371927, 20144065902012, 8558343705069, 2730558787586, 613985498319, 86678396880, 5778559792

Offset

-1,2

Comments

Note a(17) > a(18) < a(19). - Sean A. Irvine, Aug 17 2018

References

G. M. Ziegler, Lect. on Polytopes, Springer 1995, p. 273.

Links

Table of n, a(n) for n=-1..29.

Crossrefs

Sequence in context: A323802 A161586 A350612 * A295449 A092088 A068302

Adjacent sequences: A013638 A013639 A013640 * A013642 A013643 A013644

Keyword

nonn,fini,full

Author

N. J. A. Sloane

Extensions

More terms from Ziegler reference added by Sean A. Irvine, Aug 17 2018

Status

approved