# A175937 (b-file synthesized from sequence entry) 0 1 1 2 2 10 3 62 4 448 5 3464 6 28111 7 236022 8 2033145 9 17867442 10 159558635 11 1443747386 12 13207922431 13 121962046864 14 1135246916024 15 10640772522150 16 100346005711723 17 951400275042466 18 9063703952844960 19 86718277215053218 20 832901296331740527