# A111276 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 0 5 0 6 4 7 14 8 60 9 210 10 728 11 2442 12 8252 13 27716 14 93924 15 319964 16 1098900 17 3800928 18 13244836 19 46460738 20 164015272 21 582353976 22 2078812492