# A147134 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 1 5 1 6 3 7 13 8 31 9 81 10 343 11 1923 12 13549 13 94903 14 802247 15 8564607 16 113354205 17 1800337015 18 33663851515 19 758043047263 20 20744856409045