{sequence even, rows=5} {$sequence} {/sequence}
2 4 6 8 10
{sequence catalan, rows=10} {$sequence} {/sequence}
1 2 5 14 42 132 429 1430 4862 16796
{sequence even, catalan, rows=5} {$sequence} {/sequence}
2 14 132 1430 16796