# A124861 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 11 4 29 5 80 6 219 7 597 8 1632 9 4459 10 12181 11 33280 12 90923 13 248405 14 678656 15 1854123 16 5065557 17 13839360 18 37809835 19 103298389 20 282216448 21 771029675 22 2106492245 23 5755043840 24 15723072171 25 42956232021 26 117358608384