KeepRemoveFlag/catalan

HTML	RESULT
{sequence 25, push='mySequence'}
{pull mySequence, make, catalan} {$sequence} {/pull}	1 2 5 14 42 132 429 1430 4862 16796 58786 208012 742900 2674440 9694845 35357670 129644790 477638700 1767263190 6564120420 24466267020 91482563640 343059613650 1289904147324 4861946401452
{pull mySequence, keep, catalan} {$sequence} {/pull}	1 2 5 14
{pull mySequence, remove, catalan} {$sequence} {/pull}	3 4 6 7 8 9 10 11 12 13 15 16 17 18 19 20 21 22 23 24 25
{pull mySequence, flag, catalan} {$sequence} {/pull}	1 1 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0