（参考） https://en.wikipedia.org/wiki/Bernoulli_number Bernoulli number
Contents 1 Notation 2 History 2.1 Early history 2.2 Reconstruction of "Summae Potestatum"
Early history The Bernoulli numbers are rooted in the early history of the computation of sums of integer powers, which have been of interest to mathematicians since antiquity. Among the great mathematicians of antiquity to consider this problem were Pythagoras (c. 572–497 BCE, Greece), Archimedes (287–212 BCE, Italy), Aryabhata (b. 476, India),
https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Seki_Kowa_Katsuyo_Sampo_Bernoulli_numbers.png/330px-Seki_Kowa_Katsuyo_Sampo_Bernoulli_numbers.png A page from Seki Takakazu's Katsuyō Sanpō (1712), tabulati
