$N = 6;
for $i (reverse(1..$N)){
    for $j (1..$i){
    print "$j,",$j+1-$i+$N,",";
    }
    print "\b\n";
}

[download]
(Update:Generalized Version)
--Artist

In reply to Re: generating pyramid number sequence by artist
in thread generating pyramid number sequence by Anonymous Monk

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