# A067654 (b-file synthesized from sequence entry) 1 2 2 4 3 22 4 38 5 314 6 1504 7 16346 8 24796 9 331906 10 2426404 11 38445118 12 163944598 13 2993870654 14 2647864592 15 601353085846 16 820420721222 17 18874008233858 18 20741357283932 19 5782164084903302 20 38314394323494974 21 1059898973520975218