# A275787 (b-file synthesized from sequence entry) 1 1 2 5 3 41 4 509 5 8469 6 176217 7 4400325 8 128203049 9 4268957449 10 159922273421 11 6656731517249 12 304797275277365 13 15224868078068845 14 823874409422614577 15 48012621942105876301 16 2997884066292303095889 17 199666128081901473290833 18 14129411123649333432720277 19 1058688691179737704258634521 20 83732563305101190468369022317 21 6971039973751002759723517967941