Like a primorial function, but including perfect powers of primes, but when multiplying, the exponent is reduced to 1.
The partial products of 2 3 2 5 7 2 3 11 13 2 17 19 23 5 3 29 31 2 37 ..., so 2 6 12 60 420 840 2520 ...
Inspired by Chinese remainder theorem.
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