An explanation is provided for the Inca counting board described by Guaman Poma in 1615. Although the board could have been used in more than one way, we show that based on certain reasonable assumptions regarding non-uniform representation of numbers its most likely use was counting in multiples of 6, 24, and 72. The independent numbers represented on its five rows are 92, 31, 29, 79, and 56 that appear to be astronomically connected to sub-periods within the year and planet periods in a manner similar to Mayan astronomy. Based on these and other considerations we propose that the board fulfilled an astronomical counting function.

中文翻译：

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瓜曼·波马（GuámanPoma）的《尤帕娜（Yupana）和印加天文学》

为Guaman Poma在1615年描述的印加计数板提供了一种解释。尽管该板可以以多种方式使用，但我们表明，基于有关数字非均匀表示的某些合理假设，它最有可能用于计数以6、24和72的倍数表示。在其五行上表示的独立数字是92、31、29、79和56，这些数字似乎在天文数字上与年份和行星周期内的子周期相关联，类似于玛雅天文学。基于这些和其他考虑，我们建议董事会履行天文计数功能。