# A371431 (b-file synthesized from sequence entry) 0 1 1 2 2 7 3 29 4 131 5 623 6 3064 7 15423 8 78936 9 408958 10 2137993 11 11252163 12 59508232 13 315786764 14 1679410076 15 8941421014 16 47613443433 17 253359512287 18 1346009853489 19 7133000408765 20 37669665812955 21 198034693198875 22 1035095172883710 23 5371011415598595 24 27615259784888724