# A179467 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 7 4 19 5 47 6 131 7 351 8 992 9 2808 10 8131 11 23723 12 70192 13 209209 14 629165 15 1904391 16 5801109 17 17764063 18 54663309 19 168925259 20 524064687 21 1631511342 22 5095440198 23 15960070908 24 50124189982 25 157806721089 26 497953049736 27 1574573746276