Happy 16345270

A curious progression of factors that can also be premultiplied by $(-1{)}^8$ and written $\prod _{k=0}^4(2k-1{)}^{8-2k}$. (Others write $(\sum _{k=0}^{9}k{)}^2$, or $\sum _{k=0}^9{k}^3$.)

 
From: https://www-cs-faculty.stanford.edu/~knuth/news25.html