# A303260 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 28 4 273 5 3421 6 52288 7 941578 8 19505545 9 456790123 10 11931215316 11 343871642632 12 10840081272265 13 371026432467913 14 13702802011918048 15 543154131059225686 16 23000016472483168305 17 1036227971225610466711 18 49492629462587441963140 19 2497992686980609418282548 20 132849300060919364474261281