# A278641 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 10 4 45 5 252 6 1130 7 5270 8 23520 9 106960 10 483756 11 2211650 12 10149805 13 46911060 14 217868310 15 1017057518 16 4767797895 17 22438419120 18 105960938380 19 501928967930 20 2384171386941 21 11353241261180 22 54185968572450 23 259150507387910 24 1241763071712930 25 5960463867187752 26 28656077411358180 27 137973711706163210