# A107683 (b-file synthesized from sequence entry) 1 1 2 1 3 3 4 11 5 35 6 114 7 407 8 1486 9 5414 10 19923 11 74230 12 278462 13 1049318 14 3972395 15 15101658 16 57607431 17 220391316 18 845366406 19 3250192681 20 12521965697