# A128652 (b-file synthesized from sequence entry) 1 1 2 2 3 6 4 24 5 104 6 464 7 2088 8 9392 9 42064 10 187296 11 828776 12 3644912 13 15937776 14 69317984 15 300009744 16 1292654304 17 5547021728 18 23715100480 19 101046014952 20 429209373296 21 1817975905456 22 7680278380512 23 32368750662320