# A306967 (b-file synthesized from sequence entry) 1 2 2 6 3 22 4 54 5 132 6 292 7 626 8 1290 9 2594 10 5102 11 9864 12 18792 13 35362 14 65838 15 121454 16 222246 17 403788 18 728972 19 1308562 20 2336946 21 4154170 22 7353310 23 12965904 24 22781520 25 39897410 26 69662166 27 121292998 28 210642966 29 364928532 30 630794356