# A277245 (b-file synthesized from sequence entry) 0 1 1 2 2 9 3 31 4 109 5 338 6 1029 7 2889 8 7797 9 19928 10 48965 11 115275 12 262034 13 574803 14 1222170 15 2521350 16 5060938 17 9896451 18 18891871 19 35249977 20 64390786 21 115284416 22 202560300 23 349637130 24 593499173 25 991625986 26 1632248998 27 2648936320 28 4241607523 29 6705867270 30 10474314965