# A377261 (b-file synthesized from sequence entry) 0 1 1 15 2 195 3 2340 4 26910 5 301158 6 3307590 7 35830080 8 384072975 9 4082949585 10 43113860361 11 452742067440 12 4732188244290 13 49266375442110 14 511157395433610 15 5287689996408612 16 54555878321808435 17 561579617798527185 18 5768783256563735265 19 59149668761521664040 20 605472238745163334116