# A026152 (b-file synthesized from sequence entry) 2 1 3 4 4 10 5 29 6 81 7 230 8 652 9 1854 10 5278 11 15048 12 42956 13 122772 14 351300 15 1006344 16 2885952 17 8285001 18 23809113 19 68490060 20 197211394 21 568385609 22 1639635613 23 4734036134 24 13679894484 25 39562904855 26 114507905551 27 331674931656 28 961408814434