Or, just count by 4s and 2s:

{ my $x; say for map { $x += $_ } 1,(4,2)x($LIM/6) } 
1
5
7
11
13
17
19
.
.

[download]

(At least 15x faster than your Grandma's best nested loop, too.)

In reply to Re: Inverted logic by rjt
in thread Inverted logic by BrowserUk

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