HTML RESULT 
{sequence 25, push='mySequence'}
{pull mySequence, make,   heptagonal} {$sequence} {/pull}
1 7 18 34 55 81 112 148 189 235 286 342 403 469 540 616 697 783 874 970 1071 1177 1288 1404 1525
{pull mySequence, keep,   heptagonal} {$sequence} {/pull}
1 7 18
{pull mySequence, remove, heptagonal} {$sequence} {/pull}
2 3 4 5 6 8 9 10 11 12 13 14 15 16 17 19 20 21 22 23 24 25
{pull mySequence, flag,   heptagonal} {$sequence} {/pull}
1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0