Under OEIS A064052, an Unusual number is a natural number whose largest prime factor is strictly greater than square root of the number. First 6 Unusual numbers are 2, 3, 5, 6, 7, 10.
Unusual(n, gmp = TRUE)
the number of first
a vector of length
n containing first entries from the sequence.
## generate first 20 Unusual numbers print(Unusual(20))
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