# A162367 (b-file synthesized from sequence entry) 0 1 1 25 2 324 3 2900 4 20149 5 115805 6 572975 7 2507895 8 9904050 9 35818770 10 120016066 11 376029250 12 1110031585 13 3106677225 14 8286768736 15 21161266240 16 51931463950 17 122883804990 18 281186004075 19 623785796595 20 1344621849285 21 2822018693325