# A005175 (b-file synthesized from sequence entry) 1 0 2 0 3 3 4 131 5 1830 6 16990 7 127953 8 851361 9 5231460 10 30459980 11 170761503 12 931484191 13 4979773890 14 26223530970 15 136522672653 16 704553794621 17 3611494269120 18 18415268221960 19 93516225653403 20 473366777478651 21 2390054857197150 22 12043393363764950 23 60590148885015753