# A347913 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 2 4 7 5 9 6 29 7 47 8 144 9 264 10 747 11 1531 12 4147 13 9063 14 23744 15 54522 16 140223 17 332033 18 845111 19 2045007 20 5176880 21 12713772 22 32115727 23 79676437 24 201227865 25 502852973