A345251 Numbers engraved on the 12 sides of an ancient dodecahedral rock crystal from the first century A.D.

1, 2, 3, 6, 7, 10, 11, 15, 18, 20, 30, 40

Offset

1,2

Comments

The rock crystal is held at the Archeological Museum Patras in Greece, Inv. 1280.

The stone is a grave object of a richly buried boy from Patras, Greece. Maybe it was a token. What is unusual, however, is the sequence of numbers, which in other Dodecad finds is mostly the series of integers from 1 to 12. The care with which the numbers were engraved is also unusual. Maybe there is an arithmetic game or arithmetic puzzle behind it.

References

G. Platz-Horster, Antike Polyeder, in: Jahrbuch des Deutschen Archäologischen Instituts 132, 2019, 134 (with other references).

Links

Table of n, a(n) for n=1..12.

Angelos Chaniotis, A dodecahedron of rock crystal from the Idaean cave and evidence for divination in the sacred cave of Zeus, In: Gabrilaki, I.; Tzifopoulos, Y. (Hrsgg.): Actes of the International Symposium 'Mylopotamos, from Antiquity to our Days'.

G. Platz-Horster, Patras Arch. Museum Inv. 1280

Crossrefs

Sequence in context: A014689 A117206 A026443 * A349257 A204323 A278965

Adjacent sequences: A345248 A345249 A345250 * A345252 A345253 A345254

Keyword

nonn,fini,full

Author

Helge Svenshon, Jun 12 2021

Status

approved