prog.sf

#!/usr/bin/ruby

# a(n) = largest prime factor of the number with decimal expansion 20305070...0p_n where p_n = n-th prime.
# https://oeis.org/A308899

include('../../../factordb/auto.sf')

func a(n) {
     n.prime.primes.join('0').to_i
}

var fh = File('bfile.txt').open_w

fh.autoflush(true)

for n in (1..10000) {
    var row = "#{n} #{gpf(a(n))}"
    say row
    fh.say(row)
}

__END__