# A128725 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 9 4 30 5 107 6 399 7 1537 8 6069 9 24434 10 99924 11 413943 12 1733394 13 7325471 14 31203159 15 133825441 16 577418430 17 2504681465 18 10916208453 19 47778816718 20 209923718880 21 925537620996 22 4093530000888 23 18157477014599 24 80753894026905